1 /* 2 * BSS client mode implementation 3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 4 * Copyright 2004, Instant802 Networks, Inc. 5 * Copyright 2005, Devicescape Software, Inc. 6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 8 * Copyright 2013-2014 Intel Mobile Communications GmbH 9 * Copyright (C) 2015 - 2016 Intel Deutschland GmbH 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License version 2 as 13 * published by the Free Software Foundation. 14 */ 15 16 #include <linux/delay.h> 17 #include <linux/if_ether.h> 18 #include <linux/skbuff.h> 19 #include <linux/if_arp.h> 20 #include <linux/etherdevice.h> 21 #include <linux/moduleparam.h> 22 #include <linux/rtnetlink.h> 23 #include <linux/crc32.h> 24 #include <linux/slab.h> 25 #include <linux/export.h> 26 #include <net/mac80211.h> 27 #include <asm/unaligned.h> 28 29 #include "ieee80211_i.h" 30 #include "driver-ops.h" 31 #include "rate.h" 32 #include "led.h" 33 #include "fils_aead.h" 34 35 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 36 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 37 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 38 #define IEEE80211_AUTH_MAX_TRIES 3 39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 40 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 41 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 42 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 43 #define IEEE80211_ASSOC_MAX_TRIES 3 44 45 static int max_nullfunc_tries = 2; 46 module_param(max_nullfunc_tries, int, 0644); 47 MODULE_PARM_DESC(max_nullfunc_tries, 48 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 49 50 static int max_probe_tries = 5; 51 module_param(max_probe_tries, int, 0644); 52 MODULE_PARM_DESC(max_probe_tries, 53 "Maximum probe tries before disconnecting (reason 4)."); 54 55 /* 56 * Beacon loss timeout is calculated as N frames times the 57 * advertised beacon interval. This may need to be somewhat 58 * higher than what hardware might detect to account for 59 * delays in the host processing frames. But since we also 60 * probe on beacon miss before declaring the connection lost 61 * default to what we want. 62 */ 63 static int beacon_loss_count = 7; 64 module_param(beacon_loss_count, int, 0644); 65 MODULE_PARM_DESC(beacon_loss_count, 66 "Number of beacon intervals before we decide beacon was lost."); 67 68 /* 69 * Time the connection can be idle before we probe 70 * it to see if we can still talk to the AP. 71 */ 72 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 73 /* 74 * Time we wait for a probe response after sending 75 * a probe request because of beacon loss or for 76 * checking the connection still works. 77 */ 78 static int probe_wait_ms = 500; 79 module_param(probe_wait_ms, int, 0644); 80 MODULE_PARM_DESC(probe_wait_ms, 81 "Maximum time(ms) to wait for probe response" 82 " before disconnecting (reason 4)."); 83 84 /* 85 * How many Beacon frames need to have been used in average signal strength 86 * before starting to indicate signal change events. 87 */ 88 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 89 90 /* 91 * We can have multiple work items (and connection probing) 92 * scheduling this timer, but we need to take care to only 93 * reschedule it when it should fire _earlier_ than it was 94 * asked for before, or if it's not pending right now. This 95 * function ensures that. Note that it then is required to 96 * run this function for all timeouts after the first one 97 * has happened -- the work that runs from this timer will 98 * do that. 99 */ 100 static void run_again(struct ieee80211_sub_if_data *sdata, 101 unsigned long timeout) 102 { 103 sdata_assert_lock(sdata); 104 105 if (!timer_pending(&sdata->u.mgd.timer) || 106 time_before(timeout, sdata->u.mgd.timer.expires)) 107 mod_timer(&sdata->u.mgd.timer, timeout); 108 } 109 110 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 111 { 112 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 113 return; 114 115 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 116 return; 117 118 mod_timer(&sdata->u.mgd.bcn_mon_timer, 119 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 120 } 121 122 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 123 { 124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 125 126 if (unlikely(!ifmgd->associated)) 127 return; 128 129 if (ifmgd->probe_send_count) 130 ifmgd->probe_send_count = 0; 131 132 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 133 return; 134 135 mod_timer(&ifmgd->conn_mon_timer, 136 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 137 } 138 139 static int ecw2cw(int ecw) 140 { 141 return (1 << ecw) - 1; 142 } 143 144 static u32 145 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, 146 struct ieee80211_supported_band *sband, 147 struct ieee80211_channel *channel, 148 const struct ieee80211_ht_cap *ht_cap, 149 const struct ieee80211_ht_operation *ht_oper, 150 const struct ieee80211_vht_operation *vht_oper, 151 struct cfg80211_chan_def *chandef, bool tracking) 152 { 153 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 154 struct cfg80211_chan_def vht_chandef; 155 struct ieee80211_sta_ht_cap sta_ht_cap; 156 u32 ht_cfreq, ret; 157 158 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 159 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 160 161 chandef->chan = channel; 162 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 163 chandef->center_freq1 = channel->center_freq; 164 chandef->center_freq2 = 0; 165 166 if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) { 167 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 168 goto out; 169 } 170 171 chandef->width = NL80211_CHAN_WIDTH_20; 172 173 if (!(ht_cap->cap_info & 174 cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) { 175 ret = IEEE80211_STA_DISABLE_40MHZ; 176 vht_chandef = *chandef; 177 goto out; 178 } 179 180 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 181 channel->band); 182 /* check that channel matches the right operating channel */ 183 if (!tracking && channel->center_freq != ht_cfreq) { 184 /* 185 * It's possible that some APs are confused here; 186 * Netgear WNDR3700 sometimes reports 4 higher than 187 * the actual channel in association responses, but 188 * since we look at probe response/beacon data here 189 * it should be OK. 190 */ 191 sdata_info(sdata, 192 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 193 channel->center_freq, ht_cfreq, 194 ht_oper->primary_chan, channel->band); 195 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 196 goto out; 197 } 198 199 /* check 40 MHz support, if we have it */ 200 if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) { 201 ieee80211_chandef_ht_oper(ht_oper, chandef); 202 } else { 203 /* 40 MHz (and 80 MHz) must be supported for VHT */ 204 ret = IEEE80211_STA_DISABLE_VHT; 205 /* also mark 40 MHz disabled */ 206 ret |= IEEE80211_STA_DISABLE_40MHZ; 207 goto out; 208 } 209 210 if (!vht_oper || !sband->vht_cap.vht_supported) { 211 ret = IEEE80211_STA_DISABLE_VHT; 212 goto out; 213 } 214 215 vht_chandef = *chandef; 216 if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) { 217 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 218 sdata_info(sdata, 219 "AP VHT information is invalid, disable VHT\n"); 220 ret = IEEE80211_STA_DISABLE_VHT; 221 goto out; 222 } 223 224 if (!cfg80211_chandef_valid(&vht_chandef)) { 225 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 226 sdata_info(sdata, 227 "AP VHT information is invalid, disable VHT\n"); 228 ret = IEEE80211_STA_DISABLE_VHT; 229 goto out; 230 } 231 232 if (cfg80211_chandef_identical(chandef, &vht_chandef)) { 233 ret = 0; 234 goto out; 235 } 236 237 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 238 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 239 sdata_info(sdata, 240 "AP VHT information doesn't match HT, disable VHT\n"); 241 ret = IEEE80211_STA_DISABLE_VHT; 242 goto out; 243 } 244 245 *chandef = vht_chandef; 246 247 ret = 0; 248 249 out: 250 /* 251 * When tracking the current AP, don't do any further checks if the 252 * new chandef is identical to the one we're currently using for the 253 * connection. This keeps us from playing ping-pong with regulatory, 254 * without it the following can happen (for example): 255 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 256 * - AP advertises regdom US 257 * - CRDA loads regdom US with 80 MHz prohibited (old database) 258 * - the code below detects an unsupported channel, downgrades, and 259 * we disconnect from the AP in the caller 260 * - disconnect causes CRDA to reload world regdomain and the game 261 * starts anew. 262 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 263 * 264 * It seems possible that there are still scenarios with CSA or real 265 * bandwidth changes where a this could happen, but those cases are 266 * less common and wouldn't completely prevent using the AP. 267 */ 268 if (tracking && 269 cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) 270 return ret; 271 272 /* don't print the message below for VHT mismatch if VHT is disabled */ 273 if (ret & IEEE80211_STA_DISABLE_VHT) 274 vht_chandef = *chandef; 275 276 /* 277 * Ignore the DISABLED flag when we're already connected and only 278 * tracking the APs beacon for bandwidth changes - otherwise we 279 * might get disconnected here if we connect to an AP, update our 280 * regulatory information based on the AP's country IE and the 281 * information we have is wrong/outdated and disables the channel 282 * that we're actually using for the connection to the AP. 283 */ 284 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, 285 tracking ? 0 : 286 IEEE80211_CHAN_DISABLED)) { 287 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { 288 ret = IEEE80211_STA_DISABLE_HT | 289 IEEE80211_STA_DISABLE_VHT; 290 break; 291 } 292 293 ret |= ieee80211_chandef_downgrade(chandef); 294 } 295 296 if (chandef->width != vht_chandef.width && !tracking) 297 sdata_info(sdata, 298 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n"); 299 300 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef)); 301 return ret; 302 } 303 304 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, 305 struct sta_info *sta, 306 const struct ieee80211_ht_cap *ht_cap, 307 const struct ieee80211_ht_operation *ht_oper, 308 const struct ieee80211_vht_operation *vht_oper, 309 const u8 *bssid, u32 *changed) 310 { 311 struct ieee80211_local *local = sdata->local; 312 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 313 struct ieee80211_supported_band *sband; 314 struct ieee80211_channel *chan; 315 struct cfg80211_chan_def chandef; 316 u16 ht_opmode; 317 u32 flags; 318 enum ieee80211_sta_rx_bandwidth new_sta_bw; 319 int ret; 320 321 /* if HT was/is disabled, don't track any bandwidth changes */ 322 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper) 323 return 0; 324 325 /* don't check VHT if we associated as non-VHT station */ 326 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 327 vht_oper = NULL; 328 329 if (WARN_ON_ONCE(!sta)) 330 return -EINVAL; 331 332 /* 333 * if bss configuration changed store the new one - 334 * this may be applicable even if channel is identical 335 */ 336 ht_opmode = le16_to_cpu(ht_oper->operation_mode); 337 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { 338 *changed |= BSS_CHANGED_HT; 339 sdata->vif.bss_conf.ht_operation_mode = ht_opmode; 340 } 341 342 chan = sdata->vif.bss_conf.chandef.chan; 343 sband = local->hw.wiphy->bands[chan->band]; 344 345 /* calculate new channel (type) based on HT/VHT operation IEs */ 346 flags = ieee80211_determine_chantype(sdata, sband, chan, 347 ht_cap, ht_oper, vht_oper, 348 &chandef, true); 349 350 /* 351 * Downgrade the new channel if we associated with restricted 352 * capabilities. For example, if we associated as a 20 MHz STA 353 * to a 40 MHz AP (due to regulatory, capabilities or config 354 * reasons) then switching to a 40 MHz channel now won't do us 355 * any good -- we couldn't use it with the AP. 356 */ 357 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && 358 chandef.width == NL80211_CHAN_WIDTH_80P80) 359 flags |= ieee80211_chandef_downgrade(&chandef); 360 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && 361 chandef.width == NL80211_CHAN_WIDTH_160) 362 flags |= ieee80211_chandef_downgrade(&chandef); 363 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && 364 chandef.width > NL80211_CHAN_WIDTH_20) 365 flags |= ieee80211_chandef_downgrade(&chandef); 366 367 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) 368 return 0; 369 370 sdata_info(sdata, 371 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n", 372 ifmgd->bssid, chandef.chan->center_freq, chandef.width, 373 chandef.center_freq1, chandef.center_freq2); 374 375 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | 376 IEEE80211_STA_DISABLE_VHT | 377 IEEE80211_STA_DISABLE_40MHZ | 378 IEEE80211_STA_DISABLE_80P80MHZ | 379 IEEE80211_STA_DISABLE_160MHZ)) || 380 !cfg80211_chandef_valid(&chandef)) { 381 sdata_info(sdata, 382 "AP %pM changed bandwidth in a way we can't support - disconnect\n", 383 ifmgd->bssid); 384 return -EINVAL; 385 } 386 387 switch (chandef.width) { 388 case NL80211_CHAN_WIDTH_20_NOHT: 389 case NL80211_CHAN_WIDTH_20: 390 new_sta_bw = IEEE80211_STA_RX_BW_20; 391 break; 392 case NL80211_CHAN_WIDTH_40: 393 new_sta_bw = IEEE80211_STA_RX_BW_40; 394 break; 395 case NL80211_CHAN_WIDTH_80: 396 new_sta_bw = IEEE80211_STA_RX_BW_80; 397 break; 398 case NL80211_CHAN_WIDTH_80P80: 399 case NL80211_CHAN_WIDTH_160: 400 new_sta_bw = IEEE80211_STA_RX_BW_160; 401 break; 402 default: 403 return -EINVAL; 404 } 405 406 if (new_sta_bw > sta->cur_max_bandwidth) 407 new_sta_bw = sta->cur_max_bandwidth; 408 409 if (new_sta_bw < sta->sta.bandwidth) { 410 sta->sta.bandwidth = new_sta_bw; 411 rate_control_rate_update(local, sband, sta, 412 IEEE80211_RC_BW_CHANGED); 413 } 414 415 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed); 416 if (ret) { 417 sdata_info(sdata, 418 "AP %pM changed bandwidth to incompatible one - disconnect\n", 419 ifmgd->bssid); 420 return ret; 421 } 422 423 if (new_sta_bw > sta->sta.bandwidth) { 424 sta->sta.bandwidth = new_sta_bw; 425 rate_control_rate_update(local, sband, sta, 426 IEEE80211_RC_BW_CHANGED); 427 } 428 429 return 0; 430 } 431 432 /* frame sending functions */ 433 434 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 435 struct sk_buff *skb, u8 ap_ht_param, 436 struct ieee80211_supported_band *sband, 437 struct ieee80211_channel *channel, 438 enum ieee80211_smps_mode smps) 439 { 440 u8 *pos; 441 u32 flags = channel->flags; 442 u16 cap; 443 struct ieee80211_sta_ht_cap ht_cap; 444 445 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 446 447 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 448 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 449 450 /* determine capability flags */ 451 cap = ht_cap.cap; 452 453 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 454 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 455 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 456 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 457 cap &= ~IEEE80211_HT_CAP_SGI_40; 458 } 459 break; 460 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 461 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 462 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 463 cap &= ~IEEE80211_HT_CAP_SGI_40; 464 } 465 break; 466 } 467 468 /* 469 * If 40 MHz was disabled associate as though we weren't 470 * capable of 40 MHz -- some broken APs will never fall 471 * back to trying to transmit in 20 MHz. 472 */ 473 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) { 474 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 475 cap &= ~IEEE80211_HT_CAP_SGI_40; 476 } 477 478 /* set SM PS mode properly */ 479 cap &= ~IEEE80211_HT_CAP_SM_PS; 480 switch (smps) { 481 case IEEE80211_SMPS_AUTOMATIC: 482 case IEEE80211_SMPS_NUM_MODES: 483 WARN_ON(1); 484 case IEEE80211_SMPS_OFF: 485 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 486 IEEE80211_HT_CAP_SM_PS_SHIFT; 487 break; 488 case IEEE80211_SMPS_STATIC: 489 cap |= WLAN_HT_CAP_SM_PS_STATIC << 490 IEEE80211_HT_CAP_SM_PS_SHIFT; 491 break; 492 case IEEE80211_SMPS_DYNAMIC: 493 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 494 IEEE80211_HT_CAP_SM_PS_SHIFT; 495 break; 496 } 497 498 /* reserve and fill IE */ 499 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 500 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 501 } 502 503 /* This function determines vht capability flags for the association 504 * and builds the IE. 505 * Note - the function may set the owner of the MU-MIMO capability 506 */ 507 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 508 struct sk_buff *skb, 509 struct ieee80211_supported_band *sband, 510 struct ieee80211_vht_cap *ap_vht_cap) 511 { 512 struct ieee80211_local *local = sdata->local; 513 u8 *pos; 514 u32 cap; 515 struct ieee80211_sta_vht_cap vht_cap; 516 u32 mask, ap_bf_sts, our_bf_sts; 517 518 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 519 520 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 521 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 522 523 /* determine capability flags */ 524 cap = vht_cap.cap; 525 526 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) { 527 u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 528 529 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 530 if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || 531 bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) 532 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; 533 } 534 535 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) { 536 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 537 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 538 } 539 540 /* 541 * Some APs apparently get confused if our capabilities are better 542 * than theirs, so restrict what we advertise in the assoc request. 543 */ 544 if (!(ap_vht_cap->vht_cap_info & 545 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 546 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 547 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 548 else if (!(ap_vht_cap->vht_cap_info & 549 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 550 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 551 552 /* 553 * If some other vif is using the MU-MIMO capablity we cannot associate 554 * using MU-MIMO - this will lead to contradictions in the group-id 555 * mechanism. 556 * Ownership is defined since association request, in order to avoid 557 * simultaneous associations with MU-MIMO. 558 */ 559 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 560 bool disable_mu_mimo = false; 561 struct ieee80211_sub_if_data *other; 562 563 list_for_each_entry_rcu(other, &local->interfaces, list) { 564 if (other->vif.mu_mimo_owner) { 565 disable_mu_mimo = true; 566 break; 567 } 568 } 569 if (disable_mu_mimo) 570 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 571 else 572 sdata->vif.mu_mimo_owner = true; 573 } 574 575 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 576 577 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 578 our_bf_sts = cap & mask; 579 580 if (ap_bf_sts < our_bf_sts) { 581 cap &= ~mask; 582 cap |= ap_bf_sts; 583 } 584 585 /* reserve and fill IE */ 586 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 587 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 588 } 589 590 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 591 { 592 struct ieee80211_local *local = sdata->local; 593 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 594 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 595 struct sk_buff *skb; 596 struct ieee80211_mgmt *mgmt; 597 u8 *pos, qos_info; 598 size_t offset = 0, noffset; 599 int i, count, rates_len, supp_rates_len, shift; 600 u16 capab; 601 struct ieee80211_supported_band *sband; 602 struct ieee80211_chanctx_conf *chanctx_conf; 603 struct ieee80211_channel *chan; 604 u32 rate_flags, rates = 0; 605 606 sdata_assert_lock(sdata); 607 608 rcu_read_lock(); 609 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 610 if (WARN_ON(!chanctx_conf)) { 611 rcu_read_unlock(); 612 return; 613 } 614 chan = chanctx_conf->def.chan; 615 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def); 616 rcu_read_unlock(); 617 sband = local->hw.wiphy->bands[chan->band]; 618 shift = ieee80211_vif_get_shift(&sdata->vif); 619 620 if (assoc_data->supp_rates_len) { 621 /* 622 * Get all rates supported by the device and the AP as 623 * some APs don't like getting a superset of their rates 624 * in the association request (e.g. D-Link DAP 1353 in 625 * b-only mode)... 626 */ 627 rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband, 628 assoc_data->supp_rates, 629 assoc_data->supp_rates_len, 630 &rates); 631 } else { 632 /* 633 * In case AP not provide any supported rates information 634 * before association, we send information element(s) with 635 * all rates that we support. 636 */ 637 rates_len = 0; 638 for (i = 0; i < sband->n_bitrates; i++) { 639 if ((rate_flags & sband->bitrates[i].flags) 640 != rate_flags) 641 continue; 642 rates |= BIT(i); 643 rates_len++; 644 } 645 } 646 647 skb = alloc_skb(local->hw.extra_tx_headroom + 648 sizeof(*mgmt) + /* bit too much but doesn't matter */ 649 2 + assoc_data->ssid_len + /* SSID */ 650 4 + rates_len + /* (extended) rates */ 651 4 + /* power capability */ 652 2 + 2 * sband->n_channels + /* supported channels */ 653 2 + sizeof(struct ieee80211_ht_cap) + /* HT */ 654 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */ 655 assoc_data->ie_len + /* extra IEs */ 656 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 657 9, /* WMM */ 658 GFP_KERNEL); 659 if (!skb) 660 return; 661 662 skb_reserve(skb, local->hw.extra_tx_headroom); 663 664 capab = WLAN_CAPABILITY_ESS; 665 666 if (sband->band == NL80211_BAND_2GHZ) { 667 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 668 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 669 } 670 671 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY) 672 capab |= WLAN_CAPABILITY_PRIVACY; 673 674 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 675 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 676 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 677 678 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 679 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 680 681 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); 682 memset(mgmt, 0, 24); 683 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN); 684 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 685 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); 686 687 if (!is_zero_ether_addr(assoc_data->prev_bssid)) { 688 skb_put(skb, 10); 689 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 690 IEEE80211_STYPE_REASSOC_REQ); 691 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); 692 mgmt->u.reassoc_req.listen_interval = 693 cpu_to_le16(local->hw.conf.listen_interval); 694 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, 695 ETH_ALEN); 696 } else { 697 skb_put(skb, 4); 698 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 699 IEEE80211_STYPE_ASSOC_REQ); 700 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); 701 mgmt->u.assoc_req.listen_interval = 702 cpu_to_le16(local->hw.conf.listen_interval); 703 } 704 705 /* SSID */ 706 pos = skb_put(skb, 2 + assoc_data->ssid_len); 707 *pos++ = WLAN_EID_SSID; 708 *pos++ = assoc_data->ssid_len; 709 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 710 711 /* add all rates which were marked to be used above */ 712 supp_rates_len = rates_len; 713 if (supp_rates_len > 8) 714 supp_rates_len = 8; 715 716 pos = skb_put(skb, supp_rates_len + 2); 717 *pos++ = WLAN_EID_SUPP_RATES; 718 *pos++ = supp_rates_len; 719 720 count = 0; 721 for (i = 0; i < sband->n_bitrates; i++) { 722 if (BIT(i) & rates) { 723 int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 724 5 * (1 << shift)); 725 *pos++ = (u8) rate; 726 if (++count == 8) 727 break; 728 } 729 } 730 731 if (rates_len > count) { 732 pos = skb_put(skb, rates_len - count + 2); 733 *pos++ = WLAN_EID_EXT_SUPP_RATES; 734 *pos++ = rates_len - count; 735 736 for (i++; i < sband->n_bitrates; i++) { 737 if (BIT(i) & rates) { 738 int rate; 739 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 740 5 * (1 << shift)); 741 *pos++ = (u8) rate; 742 } 743 } 744 } 745 746 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 747 capab & WLAN_CAPABILITY_RADIO_MEASURE) { 748 pos = skb_put(skb, 4); 749 *pos++ = WLAN_EID_PWR_CAPABILITY; 750 *pos++ = 2; 751 *pos++ = 0; /* min tx power */ 752 /* max tx power */ 753 *pos++ = ieee80211_chandef_max_power(&chanctx_conf->def); 754 } 755 756 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { 757 /* TODO: get this in reg domain format */ 758 pos = skb_put(skb, 2 * sband->n_channels + 2); 759 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 760 *pos++ = 2 * sband->n_channels; 761 for (i = 0; i < sband->n_channels; i++) { 762 *pos++ = ieee80211_frequency_to_channel( 763 sband->channels[i].center_freq); 764 *pos++ = 1; /* one channel in the subband*/ 765 } 766 } 767 768 /* if present, add any custom IEs that go before HT */ 769 if (assoc_data->ie_len) { 770 static const u8 before_ht[] = { 771 WLAN_EID_SSID, 772 WLAN_EID_SUPP_RATES, 773 WLAN_EID_EXT_SUPP_RATES, 774 WLAN_EID_PWR_CAPABILITY, 775 WLAN_EID_SUPPORTED_CHANNELS, 776 WLAN_EID_RSN, 777 WLAN_EID_QOS_CAPA, 778 WLAN_EID_RRM_ENABLED_CAPABILITIES, 779 WLAN_EID_MOBILITY_DOMAIN, 780 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 781 WLAN_EID_RIC_DATA, /* reassoc only */ 782 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 783 }; 784 static const u8 after_ric[] = { 785 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 786 WLAN_EID_HT_CAPABILITY, 787 WLAN_EID_BSS_COEX_2040, 788 WLAN_EID_EXT_CAPABILITY, 789 WLAN_EID_QOS_TRAFFIC_CAPA, 790 WLAN_EID_TIM_BCAST_REQ, 791 WLAN_EID_INTERWORKING, 792 /* 60GHz doesn't happen right now */ 793 WLAN_EID_VHT_CAPABILITY, 794 WLAN_EID_OPMODE_NOTIF, 795 }; 796 797 noffset = ieee80211_ie_split_ric(assoc_data->ie, 798 assoc_data->ie_len, 799 before_ht, 800 ARRAY_SIZE(before_ht), 801 after_ric, 802 ARRAY_SIZE(after_ric), 803 offset); 804 pos = skb_put(skb, noffset - offset); 805 memcpy(pos, assoc_data->ie + offset, noffset - offset); 806 offset = noffset; 807 } 808 809 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 810 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))) 811 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 812 813 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 814 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param, 815 sband, chan, sdata->smps_mode); 816 817 /* if present, add any custom IEs that go before VHT */ 818 if (assoc_data->ie_len) { 819 static const u8 before_vht[] = { 820 WLAN_EID_SSID, 821 WLAN_EID_SUPP_RATES, 822 WLAN_EID_EXT_SUPP_RATES, 823 WLAN_EID_PWR_CAPABILITY, 824 WLAN_EID_SUPPORTED_CHANNELS, 825 WLAN_EID_RSN, 826 WLAN_EID_QOS_CAPA, 827 WLAN_EID_RRM_ENABLED_CAPABILITIES, 828 WLAN_EID_MOBILITY_DOMAIN, 829 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 830 WLAN_EID_HT_CAPABILITY, 831 WLAN_EID_BSS_COEX_2040, 832 WLAN_EID_EXT_CAPABILITY, 833 WLAN_EID_QOS_TRAFFIC_CAPA, 834 WLAN_EID_TIM_BCAST_REQ, 835 WLAN_EID_INTERWORKING, 836 }; 837 838 /* RIC already taken above, so no need to handle here anymore */ 839 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len, 840 before_vht, ARRAY_SIZE(before_vht), 841 offset); 842 pos = skb_put(skb, noffset - offset); 843 memcpy(pos, assoc_data->ie + offset, noffset - offset); 844 offset = noffset; 845 } 846 847 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 848 ieee80211_add_vht_ie(sdata, skb, sband, 849 &assoc_data->ap_vht_cap); 850 851 /* if present, add any custom non-vendor IEs that go after HT */ 852 if (assoc_data->ie_len) { 853 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 854 assoc_data->ie_len, 855 offset); 856 pos = skb_put(skb, noffset - offset); 857 memcpy(pos, assoc_data->ie + offset, noffset - offset); 858 offset = noffset; 859 } 860 861 if (assoc_data->wmm) { 862 if (assoc_data->uapsd) { 863 qos_info = ifmgd->uapsd_queues; 864 qos_info |= (ifmgd->uapsd_max_sp_len << 865 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 866 } else { 867 qos_info = 0; 868 } 869 870 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 871 } 872 873 /* add any remaining custom (i.e. vendor specific here) IEs */ 874 if (assoc_data->ie_len) { 875 noffset = assoc_data->ie_len; 876 pos = skb_put(skb, noffset - offset); 877 memcpy(pos, assoc_data->ie + offset, noffset - offset); 878 } 879 880 if (assoc_data->fils_kek_len && 881 fils_encrypt_assoc_req(skb, assoc_data) < 0) { 882 dev_kfree_skb(skb); 883 return; 884 } 885 886 drv_mgd_prepare_tx(local, sdata); 887 888 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 889 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 890 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 891 IEEE80211_TX_INTFL_MLME_CONN_TX; 892 ieee80211_tx_skb(sdata, skb); 893 } 894 895 void ieee80211_send_pspoll(struct ieee80211_local *local, 896 struct ieee80211_sub_if_data *sdata) 897 { 898 struct ieee80211_pspoll *pspoll; 899 struct sk_buff *skb; 900 901 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 902 if (!skb) 903 return; 904 905 pspoll = (struct ieee80211_pspoll *) skb->data; 906 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 907 908 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 909 ieee80211_tx_skb(sdata, skb); 910 } 911 912 void ieee80211_send_nullfunc(struct ieee80211_local *local, 913 struct ieee80211_sub_if_data *sdata, 914 bool powersave) 915 { 916 struct sk_buff *skb; 917 struct ieee80211_hdr_3addr *nullfunc; 918 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 919 920 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif); 921 if (!skb) 922 return; 923 924 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 925 if (powersave) 926 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 927 928 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 929 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 930 931 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 932 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 933 934 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 935 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 936 937 ieee80211_tx_skb(sdata, skb); 938 } 939 940 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 941 struct ieee80211_sub_if_data *sdata) 942 { 943 struct sk_buff *skb; 944 struct ieee80211_hdr *nullfunc; 945 __le16 fc; 946 947 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 948 return; 949 950 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 951 if (!skb) 952 return; 953 954 skb_reserve(skb, local->hw.extra_tx_headroom); 955 956 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30); 957 memset(nullfunc, 0, 30); 958 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 959 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 960 nullfunc->frame_control = fc; 961 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); 962 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 963 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); 964 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 965 966 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 967 ieee80211_tx_skb(sdata, skb); 968 } 969 970 /* spectrum management related things */ 971 static void ieee80211_chswitch_work(struct work_struct *work) 972 { 973 struct ieee80211_sub_if_data *sdata = 974 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); 975 struct ieee80211_local *local = sdata->local; 976 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 977 int ret; 978 979 if (!ieee80211_sdata_running(sdata)) 980 return; 981 982 sdata_lock(sdata); 983 mutex_lock(&local->mtx); 984 mutex_lock(&local->chanctx_mtx); 985 986 if (!ifmgd->associated) 987 goto out; 988 989 if (!sdata->vif.csa_active) 990 goto out; 991 992 /* 993 * using reservation isn't immediate as it may be deferred until later 994 * with multi-vif. once reservation is complete it will re-schedule the 995 * work with no reserved_chanctx so verify chandef to check if it 996 * completed successfully 997 */ 998 999 if (sdata->reserved_chanctx) { 1000 /* 1001 * with multi-vif csa driver may call ieee80211_csa_finish() 1002 * many times while waiting for other interfaces to use their 1003 * reservations 1004 */ 1005 if (sdata->reserved_ready) 1006 goto out; 1007 1008 ret = ieee80211_vif_use_reserved_context(sdata); 1009 if (ret) { 1010 sdata_info(sdata, 1011 "failed to use reserved channel context, disconnecting (err=%d)\n", 1012 ret); 1013 ieee80211_queue_work(&sdata->local->hw, 1014 &ifmgd->csa_connection_drop_work); 1015 goto out; 1016 } 1017 1018 goto out; 1019 } 1020 1021 if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef, 1022 &sdata->csa_chandef)) { 1023 sdata_info(sdata, 1024 "failed to finalize channel switch, disconnecting\n"); 1025 ieee80211_queue_work(&sdata->local->hw, 1026 &ifmgd->csa_connection_drop_work); 1027 goto out; 1028 } 1029 1030 /* XXX: shouldn't really modify cfg80211-owned data! */ 1031 ifmgd->associated->channel = sdata->csa_chandef.chan; 1032 1033 ifmgd->csa_waiting_bcn = true; 1034 1035 ieee80211_sta_reset_beacon_monitor(sdata); 1036 ieee80211_sta_reset_conn_monitor(sdata); 1037 1038 out: 1039 mutex_unlock(&local->chanctx_mtx); 1040 mutex_unlock(&local->mtx); 1041 sdata_unlock(sdata); 1042 } 1043 1044 static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata) 1045 { 1046 struct ieee80211_local *local = sdata->local; 1047 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1048 int ret; 1049 1050 sdata_assert_lock(sdata); 1051 1052 WARN_ON(!sdata->vif.csa_active); 1053 1054 if (sdata->csa_block_tx) { 1055 ieee80211_wake_vif_queues(local, sdata, 1056 IEEE80211_QUEUE_STOP_REASON_CSA); 1057 sdata->csa_block_tx = false; 1058 } 1059 1060 sdata->vif.csa_active = false; 1061 ifmgd->csa_waiting_bcn = false; 1062 1063 ret = drv_post_channel_switch(sdata); 1064 if (ret) { 1065 sdata_info(sdata, 1066 "driver post channel switch failed, disconnecting\n"); 1067 ieee80211_queue_work(&local->hw, 1068 &ifmgd->csa_connection_drop_work); 1069 return; 1070 } 1071 1072 cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef); 1073 } 1074 1075 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success) 1076 { 1077 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1078 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1079 1080 trace_api_chswitch_done(sdata, success); 1081 if (!success) { 1082 sdata_info(sdata, 1083 "driver channel switch failed, disconnecting\n"); 1084 ieee80211_queue_work(&sdata->local->hw, 1085 &ifmgd->csa_connection_drop_work); 1086 } else { 1087 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); 1088 } 1089 } 1090 EXPORT_SYMBOL(ieee80211_chswitch_done); 1091 1092 static void ieee80211_chswitch_timer(unsigned long data) 1093 { 1094 struct ieee80211_sub_if_data *sdata = 1095 (struct ieee80211_sub_if_data *) data; 1096 1097 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); 1098 } 1099 1100 static void 1101 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, 1102 u64 timestamp, u32 device_timestamp, 1103 struct ieee802_11_elems *elems, 1104 bool beacon) 1105 { 1106 struct ieee80211_local *local = sdata->local; 1107 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1108 struct cfg80211_bss *cbss = ifmgd->associated; 1109 struct ieee80211_chanctx_conf *conf; 1110 struct ieee80211_chanctx *chanctx; 1111 enum nl80211_band current_band; 1112 struct ieee80211_csa_ie csa_ie; 1113 struct ieee80211_channel_switch ch_switch; 1114 int res; 1115 1116 sdata_assert_lock(sdata); 1117 1118 if (!cbss) 1119 return; 1120 1121 if (local->scanning) 1122 return; 1123 1124 /* disregard subsequent announcements if we are already processing */ 1125 if (sdata->vif.csa_active) 1126 return; 1127 1128 current_band = cbss->channel->band; 1129 memset(&csa_ie, 0, sizeof(csa_ie)); 1130 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 1131 ifmgd->flags, 1132 ifmgd->associated->bssid, &csa_ie); 1133 if (res < 0) 1134 ieee80211_queue_work(&local->hw, 1135 &ifmgd->csa_connection_drop_work); 1136 if (res) 1137 return; 1138 1139 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef, 1140 IEEE80211_CHAN_DISABLED)) { 1141 sdata_info(sdata, 1142 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 1143 ifmgd->associated->bssid, 1144 csa_ie.chandef.chan->center_freq, 1145 csa_ie.chandef.width, csa_ie.chandef.center_freq1, 1146 csa_ie.chandef.center_freq2); 1147 ieee80211_queue_work(&local->hw, 1148 &ifmgd->csa_connection_drop_work); 1149 return; 1150 } 1151 1152 if (cfg80211_chandef_identical(&csa_ie.chandef, 1153 &sdata->vif.bss_conf.chandef)) { 1154 if (ifmgd->csa_ignored_same_chan) 1155 return; 1156 sdata_info(sdata, 1157 "AP %pM tries to chanswitch to same channel, ignore\n", 1158 ifmgd->associated->bssid); 1159 ifmgd->csa_ignored_same_chan = true; 1160 return; 1161 } 1162 1163 /* 1164 * Drop all TDLS peers - either we disconnect or move to a different 1165 * channel from this point on. There's no telling what our peer will do. 1166 * The TDLS WIDER_BW scenario is also problematic, as peers might now 1167 * have an incompatible wider chandef. 1168 */ 1169 ieee80211_teardown_tdls_peers(sdata); 1170 1171 mutex_lock(&local->mtx); 1172 mutex_lock(&local->chanctx_mtx); 1173 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1174 lockdep_is_held(&local->chanctx_mtx)); 1175 if (!conf) { 1176 sdata_info(sdata, 1177 "no channel context assigned to vif?, disconnecting\n"); 1178 goto drop_connection; 1179 } 1180 1181 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 1182 1183 if (local->use_chanctx && 1184 !ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 1185 sdata_info(sdata, 1186 "driver doesn't support chan-switch with channel contexts\n"); 1187 goto drop_connection; 1188 } 1189 1190 ch_switch.timestamp = timestamp; 1191 ch_switch.device_timestamp = device_timestamp; 1192 ch_switch.block_tx = csa_ie.mode; 1193 ch_switch.chandef = csa_ie.chandef; 1194 ch_switch.count = csa_ie.count; 1195 1196 if (drv_pre_channel_switch(sdata, &ch_switch)) { 1197 sdata_info(sdata, 1198 "preparing for channel switch failed, disconnecting\n"); 1199 goto drop_connection; 1200 } 1201 1202 res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef, 1203 chanctx->mode, false); 1204 if (res) { 1205 sdata_info(sdata, 1206 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 1207 res); 1208 goto drop_connection; 1209 } 1210 mutex_unlock(&local->chanctx_mtx); 1211 1212 sdata->vif.csa_active = true; 1213 sdata->csa_chandef = csa_ie.chandef; 1214 sdata->csa_block_tx = csa_ie.mode; 1215 ifmgd->csa_ignored_same_chan = false; 1216 1217 if (sdata->csa_block_tx) 1218 ieee80211_stop_vif_queues(local, sdata, 1219 IEEE80211_QUEUE_STOP_REASON_CSA); 1220 mutex_unlock(&local->mtx); 1221 1222 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef, 1223 csa_ie.count); 1224 1225 if (local->ops->channel_switch) { 1226 /* use driver's channel switch callback */ 1227 drv_channel_switch(local, sdata, &ch_switch); 1228 return; 1229 } 1230 1231 /* channel switch handled in software */ 1232 if (csa_ie.count <= 1) 1233 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work); 1234 else 1235 mod_timer(&ifmgd->chswitch_timer, 1236 TU_TO_EXP_TIME((csa_ie.count - 1) * 1237 cbss->beacon_interval)); 1238 return; 1239 drop_connection: 1240 ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); 1241 mutex_unlock(&local->chanctx_mtx); 1242 mutex_unlock(&local->mtx); 1243 } 1244 1245 static bool 1246 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 1247 struct ieee80211_channel *channel, 1248 const u8 *country_ie, u8 country_ie_len, 1249 const u8 *pwr_constr_elem, 1250 int *chan_pwr, int *pwr_reduction) 1251 { 1252 struct ieee80211_country_ie_triplet *triplet; 1253 int chan = ieee80211_frequency_to_channel(channel->center_freq); 1254 int i, chan_increment; 1255 bool have_chan_pwr = false; 1256 1257 /* Invalid IE */ 1258 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1259 return false; 1260 1261 triplet = (void *)(country_ie + 3); 1262 country_ie_len -= 3; 1263 1264 switch (channel->band) { 1265 default: 1266 WARN_ON_ONCE(1); 1267 /* fall through */ 1268 case NL80211_BAND_2GHZ: 1269 case NL80211_BAND_60GHZ: 1270 chan_increment = 1; 1271 break; 1272 case NL80211_BAND_5GHZ: 1273 chan_increment = 4; 1274 break; 1275 } 1276 1277 /* find channel */ 1278 while (country_ie_len >= 3) { 1279 u8 first_channel = triplet->chans.first_channel; 1280 1281 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 1282 goto next; 1283 1284 for (i = 0; i < triplet->chans.num_channels; i++) { 1285 if (first_channel + i * chan_increment == chan) { 1286 have_chan_pwr = true; 1287 *chan_pwr = triplet->chans.max_power; 1288 break; 1289 } 1290 } 1291 if (have_chan_pwr) 1292 break; 1293 1294 next: 1295 triplet++; 1296 country_ie_len -= 3; 1297 } 1298 1299 if (have_chan_pwr && pwr_constr_elem) 1300 *pwr_reduction = *pwr_constr_elem; 1301 else 1302 *pwr_reduction = 0; 1303 1304 return have_chan_pwr; 1305 } 1306 1307 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 1308 struct ieee80211_channel *channel, 1309 const u8 *cisco_dtpc_ie, 1310 int *pwr_level) 1311 { 1312 /* From practical testing, the first data byte of the DTPC element 1313 * seems to contain the requested dBm level, and the CLI on Cisco 1314 * APs clearly state the range is -127 to 127 dBm, which indicates 1315 * a signed byte, although it seemingly never actually goes negative. 1316 * The other byte seems to always be zero. 1317 */ 1318 *pwr_level = (__s8)cisco_dtpc_ie[4]; 1319 } 1320 1321 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, 1322 struct ieee80211_channel *channel, 1323 struct ieee80211_mgmt *mgmt, 1324 const u8 *country_ie, u8 country_ie_len, 1325 const u8 *pwr_constr_ie, 1326 const u8 *cisco_dtpc_ie) 1327 { 1328 bool has_80211h_pwr = false, has_cisco_pwr = false; 1329 int chan_pwr = 0, pwr_reduction_80211h = 0; 1330 int pwr_level_cisco, pwr_level_80211h; 1331 int new_ap_level; 1332 __le16 capab = mgmt->u.probe_resp.capab_info; 1333 1334 if (country_ie && 1335 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 1336 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 1337 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 1338 sdata, channel, country_ie, country_ie_len, 1339 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 1340 pwr_level_80211h = 1341 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 1342 } 1343 1344 if (cisco_dtpc_ie) { 1345 ieee80211_find_cisco_dtpc( 1346 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 1347 has_cisco_pwr = true; 1348 } 1349 1350 if (!has_80211h_pwr && !has_cisco_pwr) 1351 return 0; 1352 1353 /* If we have both 802.11h and Cisco DTPC, apply both limits 1354 * by picking the smallest of the two power levels advertised. 1355 */ 1356 if (has_80211h_pwr && 1357 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 1358 new_ap_level = pwr_level_80211h; 1359 1360 if (sdata->ap_power_level == new_ap_level) 1361 return 0; 1362 1363 sdata_dbg(sdata, 1364 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 1365 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 1366 sdata->u.mgd.bssid); 1367 } else { /* has_cisco_pwr is always true here. */ 1368 new_ap_level = pwr_level_cisco; 1369 1370 if (sdata->ap_power_level == new_ap_level) 1371 return 0; 1372 1373 sdata_dbg(sdata, 1374 "Limiting TX power to %d dBm as advertised by %pM\n", 1375 pwr_level_cisco, sdata->u.mgd.bssid); 1376 } 1377 1378 sdata->ap_power_level = new_ap_level; 1379 if (__ieee80211_recalc_txpower(sdata)) 1380 return BSS_CHANGED_TXPOWER; 1381 return 0; 1382 } 1383 1384 /* powersave */ 1385 static void ieee80211_enable_ps(struct ieee80211_local *local, 1386 struct ieee80211_sub_if_data *sdata) 1387 { 1388 struct ieee80211_conf *conf = &local->hw.conf; 1389 1390 /* 1391 * If we are scanning right now then the parameters will 1392 * take effect when scan finishes. 1393 */ 1394 if (local->scanning) 1395 return; 1396 1397 if (conf->dynamic_ps_timeout > 0 && 1398 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 1399 mod_timer(&local->dynamic_ps_timer, jiffies + 1400 msecs_to_jiffies(conf->dynamic_ps_timeout)); 1401 } else { 1402 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 1403 ieee80211_send_nullfunc(local, sdata, true); 1404 1405 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1406 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1407 return; 1408 1409 conf->flags |= IEEE80211_CONF_PS; 1410 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1411 } 1412 } 1413 1414 static void ieee80211_change_ps(struct ieee80211_local *local) 1415 { 1416 struct ieee80211_conf *conf = &local->hw.conf; 1417 1418 if (local->ps_sdata) { 1419 ieee80211_enable_ps(local, local->ps_sdata); 1420 } else if (conf->flags & IEEE80211_CONF_PS) { 1421 conf->flags &= ~IEEE80211_CONF_PS; 1422 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1423 del_timer_sync(&local->dynamic_ps_timer); 1424 cancel_work_sync(&local->dynamic_ps_enable_work); 1425 } 1426 } 1427 1428 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 1429 { 1430 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 1431 struct sta_info *sta = NULL; 1432 bool authorized = false; 1433 1434 if (!mgd->powersave) 1435 return false; 1436 1437 if (mgd->broken_ap) 1438 return false; 1439 1440 if (!mgd->associated) 1441 return false; 1442 1443 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 1444 return false; 1445 1446 if (!mgd->have_beacon) 1447 return false; 1448 1449 rcu_read_lock(); 1450 sta = sta_info_get(sdata, mgd->bssid); 1451 if (sta) 1452 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 1453 rcu_read_unlock(); 1454 1455 return authorized; 1456 } 1457 1458 /* need to hold RTNL or interface lock */ 1459 void ieee80211_recalc_ps(struct ieee80211_local *local) 1460 { 1461 struct ieee80211_sub_if_data *sdata, *found = NULL; 1462 int count = 0; 1463 int timeout; 1464 1465 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) { 1466 local->ps_sdata = NULL; 1467 return; 1468 } 1469 1470 list_for_each_entry(sdata, &local->interfaces, list) { 1471 if (!ieee80211_sdata_running(sdata)) 1472 continue; 1473 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1474 /* If an AP vif is found, then disable PS 1475 * by setting the count to zero thereby setting 1476 * ps_sdata to NULL. 1477 */ 1478 count = 0; 1479 break; 1480 } 1481 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1482 continue; 1483 found = sdata; 1484 count++; 1485 } 1486 1487 if (count == 1 && ieee80211_powersave_allowed(found)) { 1488 u8 dtimper = found->u.mgd.dtim_period; 1489 s32 beaconint_us; 1490 1491 beaconint_us = ieee80211_tu_to_usec( 1492 found->vif.bss_conf.beacon_int); 1493 1494 timeout = local->dynamic_ps_forced_timeout; 1495 if (timeout < 0) 1496 timeout = 100; 1497 local->hw.conf.dynamic_ps_timeout = timeout; 1498 1499 /* If the TIM IE is invalid, pretend the value is 1 */ 1500 if (!dtimper) 1501 dtimper = 1; 1502 1503 local->hw.conf.ps_dtim_period = dtimper; 1504 local->ps_sdata = found; 1505 } else { 1506 local->ps_sdata = NULL; 1507 } 1508 1509 ieee80211_change_ps(local); 1510 } 1511 1512 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 1513 { 1514 bool ps_allowed = ieee80211_powersave_allowed(sdata); 1515 1516 if (sdata->vif.bss_conf.ps != ps_allowed) { 1517 sdata->vif.bss_conf.ps = ps_allowed; 1518 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS); 1519 } 1520 } 1521 1522 void ieee80211_dynamic_ps_disable_work(struct work_struct *work) 1523 { 1524 struct ieee80211_local *local = 1525 container_of(work, struct ieee80211_local, 1526 dynamic_ps_disable_work); 1527 1528 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 1529 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 1530 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1531 } 1532 1533 ieee80211_wake_queues_by_reason(&local->hw, 1534 IEEE80211_MAX_QUEUE_MAP, 1535 IEEE80211_QUEUE_STOP_REASON_PS, 1536 false); 1537 } 1538 1539 void ieee80211_dynamic_ps_enable_work(struct work_struct *work) 1540 { 1541 struct ieee80211_local *local = 1542 container_of(work, struct ieee80211_local, 1543 dynamic_ps_enable_work); 1544 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 1545 struct ieee80211_if_managed *ifmgd; 1546 unsigned long flags; 1547 int q; 1548 1549 /* can only happen when PS was just disabled anyway */ 1550 if (!sdata) 1551 return; 1552 1553 ifmgd = &sdata->u.mgd; 1554 1555 if (local->hw.conf.flags & IEEE80211_CONF_PS) 1556 return; 1557 1558 if (local->hw.conf.dynamic_ps_timeout > 0) { 1559 /* don't enter PS if TX frames are pending */ 1560 if (drv_tx_frames_pending(local)) { 1561 mod_timer(&local->dynamic_ps_timer, jiffies + 1562 msecs_to_jiffies( 1563 local->hw.conf.dynamic_ps_timeout)); 1564 return; 1565 } 1566 1567 /* 1568 * transmission can be stopped by others which leads to 1569 * dynamic_ps_timer expiry. Postpone the ps timer if it 1570 * is not the actual idle state. 1571 */ 1572 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 1573 for (q = 0; q < local->hw.queues; q++) { 1574 if (local->queue_stop_reasons[q]) { 1575 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 1576 flags); 1577 mod_timer(&local->dynamic_ps_timer, jiffies + 1578 msecs_to_jiffies( 1579 local->hw.conf.dynamic_ps_timeout)); 1580 return; 1581 } 1582 } 1583 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1584 } 1585 1586 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 1587 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1588 if (drv_tx_frames_pending(local)) { 1589 mod_timer(&local->dynamic_ps_timer, jiffies + 1590 msecs_to_jiffies( 1591 local->hw.conf.dynamic_ps_timeout)); 1592 } else { 1593 ieee80211_send_nullfunc(local, sdata, true); 1594 /* Flush to get the tx status of nullfunc frame */ 1595 ieee80211_flush_queues(local, sdata, false); 1596 } 1597 } 1598 1599 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 1600 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 1601 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 1602 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 1603 local->hw.conf.flags |= IEEE80211_CONF_PS; 1604 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 1605 } 1606 } 1607 1608 void ieee80211_dynamic_ps_timer(unsigned long data) 1609 { 1610 struct ieee80211_local *local = (void *) data; 1611 1612 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work); 1613 } 1614 1615 void ieee80211_dfs_cac_timer_work(struct work_struct *work) 1616 { 1617 struct delayed_work *delayed_work = to_delayed_work(work); 1618 struct ieee80211_sub_if_data *sdata = 1619 container_of(delayed_work, struct ieee80211_sub_if_data, 1620 dfs_cac_timer_work); 1621 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef; 1622 1623 mutex_lock(&sdata->local->mtx); 1624 if (sdata->wdev.cac_started) { 1625 ieee80211_vif_release_channel(sdata); 1626 cfg80211_cac_event(sdata->dev, &chandef, 1627 NL80211_RADAR_CAC_FINISHED, 1628 GFP_KERNEL); 1629 } 1630 mutex_unlock(&sdata->local->mtx); 1631 } 1632 1633 static bool 1634 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1635 { 1636 struct ieee80211_local *local = sdata->local; 1637 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1638 bool ret = false; 1639 int ac; 1640 1641 if (local->hw.queues < IEEE80211_NUM_ACS) 1642 return false; 1643 1644 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1645 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 1646 int non_acm_ac; 1647 unsigned long now = jiffies; 1648 1649 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 1650 tx_tspec->admitted_time && 1651 time_after(now, tx_tspec->time_slice_start + HZ)) { 1652 tx_tspec->consumed_tx_time = 0; 1653 tx_tspec->time_slice_start = now; 1654 1655 if (tx_tspec->downgraded) 1656 tx_tspec->action = 1657 TX_TSPEC_ACTION_STOP_DOWNGRADE; 1658 } 1659 1660 switch (tx_tspec->action) { 1661 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 1662 /* take the original parameters */ 1663 if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac])) 1664 sdata_err(sdata, 1665 "failed to set TX queue parameters for queue %d\n", 1666 ac); 1667 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1668 tx_tspec->downgraded = false; 1669 ret = true; 1670 break; 1671 case TX_TSPEC_ACTION_DOWNGRADE: 1672 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 1673 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1674 ret = true; 1675 break; 1676 } 1677 /* downgrade next lower non-ACM AC */ 1678 for (non_acm_ac = ac + 1; 1679 non_acm_ac < IEEE80211_NUM_ACS; 1680 non_acm_ac++) 1681 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 1682 break; 1683 /* Usually the loop will result in using BK even if it 1684 * requires admission control, but such a configuration 1685 * makes no sense and we have to transmit somehow - the 1686 * AC selection does the same thing. 1687 * If we started out trying to downgrade from BK, then 1688 * the extra condition here might be needed. 1689 */ 1690 if (non_acm_ac >= IEEE80211_NUM_ACS) 1691 non_acm_ac = IEEE80211_AC_BK; 1692 if (drv_conf_tx(local, sdata, ac, 1693 &sdata->tx_conf[non_acm_ac])) 1694 sdata_err(sdata, 1695 "failed to set TX queue parameters for queue %d\n", 1696 ac); 1697 tx_tspec->action = TX_TSPEC_ACTION_NONE; 1698 ret = true; 1699 schedule_delayed_work(&ifmgd->tx_tspec_wk, 1700 tx_tspec->time_slice_start + HZ - now + 1); 1701 break; 1702 case TX_TSPEC_ACTION_NONE: 1703 /* nothing now */ 1704 break; 1705 } 1706 } 1707 1708 return ret; 1709 } 1710 1711 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 1712 { 1713 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 1714 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS); 1715 } 1716 1717 static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work) 1718 { 1719 struct ieee80211_sub_if_data *sdata; 1720 1721 sdata = container_of(work, struct ieee80211_sub_if_data, 1722 u.mgd.tx_tspec_wk.work); 1723 ieee80211_sta_handle_tspec_ac_params(sdata); 1724 } 1725 1726 /* MLME */ 1727 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local, 1728 struct ieee80211_sub_if_data *sdata, 1729 const u8 *wmm_param, size_t wmm_param_len) 1730 { 1731 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 1732 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1733 size_t left; 1734 int count, ac; 1735 const u8 *pos; 1736 u8 uapsd_queues = 0; 1737 1738 if (!local->ops->conf_tx) 1739 return false; 1740 1741 if (local->hw.queues < IEEE80211_NUM_ACS) 1742 return false; 1743 1744 if (!wmm_param) 1745 return false; 1746 1747 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 1748 return false; 1749 1750 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 1751 uapsd_queues = ifmgd->uapsd_queues; 1752 1753 count = wmm_param[6] & 0x0f; 1754 if (count == ifmgd->wmm_last_param_set) 1755 return false; 1756 ifmgd->wmm_last_param_set = count; 1757 1758 pos = wmm_param + 8; 1759 left = wmm_param_len - 8; 1760 1761 memset(¶ms, 0, sizeof(params)); 1762 1763 sdata->wmm_acm = 0; 1764 for (; left >= 4; left -= 4, pos += 4) { 1765 int aci = (pos[0] >> 5) & 0x03; 1766 int acm = (pos[0] >> 4) & 0x01; 1767 bool uapsd = false; 1768 1769 switch (aci) { 1770 case 1: /* AC_BK */ 1771 ac = IEEE80211_AC_BK; 1772 if (acm) 1773 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 1774 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 1775 uapsd = true; 1776 break; 1777 case 2: /* AC_VI */ 1778 ac = IEEE80211_AC_VI; 1779 if (acm) 1780 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 1781 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 1782 uapsd = true; 1783 break; 1784 case 3: /* AC_VO */ 1785 ac = IEEE80211_AC_VO; 1786 if (acm) 1787 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 1788 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 1789 uapsd = true; 1790 break; 1791 case 0: /* AC_BE */ 1792 default: 1793 ac = IEEE80211_AC_BE; 1794 if (acm) 1795 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 1796 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 1797 uapsd = true; 1798 break; 1799 } 1800 1801 params[ac].aifs = pos[0] & 0x0f; 1802 1803 if (params[ac].aifs < 2) { 1804 sdata_info(sdata, 1805 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 1806 params[ac].aifs, aci); 1807 params[ac].aifs = 2; 1808 } 1809 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 1810 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 1811 params[ac].txop = get_unaligned_le16(pos + 2); 1812 params[ac].acm = acm; 1813 params[ac].uapsd = uapsd; 1814 1815 if (params[ac].cw_min > params[ac].cw_max) { 1816 sdata_info(sdata, 1817 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 1818 params[ac].cw_min, params[ac].cw_max, aci); 1819 return false; 1820 } 1821 } 1822 1823 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1824 mlme_dbg(sdata, 1825 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 1826 ac, params[ac].acm, 1827 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 1828 params[ac].txop, params[ac].uapsd, 1829 ifmgd->tx_tspec[ac].downgraded); 1830 sdata->tx_conf[ac] = params[ac]; 1831 if (!ifmgd->tx_tspec[ac].downgraded && 1832 drv_conf_tx(local, sdata, ac, ¶ms[ac])) 1833 sdata_err(sdata, 1834 "failed to set TX queue parameters for AC %d\n", 1835 ac); 1836 } 1837 1838 /* enable WMM or activate new settings */ 1839 sdata->vif.bss_conf.qos = true; 1840 return true; 1841 } 1842 1843 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1844 { 1845 lockdep_assert_held(&sdata->local->mtx); 1846 1847 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 1848 ieee80211_run_deferred_scan(sdata->local); 1849 } 1850 1851 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 1852 { 1853 mutex_lock(&sdata->local->mtx); 1854 __ieee80211_stop_poll(sdata); 1855 mutex_unlock(&sdata->local->mtx); 1856 } 1857 1858 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, 1859 u16 capab, bool erp_valid, u8 erp) 1860 { 1861 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 1862 u32 changed = 0; 1863 bool use_protection; 1864 bool use_short_preamble; 1865 bool use_short_slot; 1866 1867 if (erp_valid) { 1868 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 1869 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 1870 } else { 1871 use_protection = false; 1872 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 1873 } 1874 1875 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 1876 if (ieee80211_get_sdata_band(sdata) == NL80211_BAND_5GHZ) 1877 use_short_slot = true; 1878 1879 if (use_protection != bss_conf->use_cts_prot) { 1880 bss_conf->use_cts_prot = use_protection; 1881 changed |= BSS_CHANGED_ERP_CTS_PROT; 1882 } 1883 1884 if (use_short_preamble != bss_conf->use_short_preamble) { 1885 bss_conf->use_short_preamble = use_short_preamble; 1886 changed |= BSS_CHANGED_ERP_PREAMBLE; 1887 } 1888 1889 if (use_short_slot != bss_conf->use_short_slot) { 1890 bss_conf->use_short_slot = use_short_slot; 1891 changed |= BSS_CHANGED_ERP_SLOT; 1892 } 1893 1894 return changed; 1895 } 1896 1897 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 1898 struct cfg80211_bss *cbss, 1899 u32 bss_info_changed) 1900 { 1901 struct ieee80211_bss *bss = (void *)cbss->priv; 1902 struct ieee80211_local *local = sdata->local; 1903 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 1904 1905 bss_info_changed |= BSS_CHANGED_ASSOC; 1906 bss_info_changed |= ieee80211_handle_bss_capability(sdata, 1907 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value); 1908 1909 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec( 1910 beacon_loss_count * bss_conf->beacon_int)); 1911 1912 sdata->u.mgd.associated = cbss; 1913 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN); 1914 1915 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE; 1916 1917 if (sdata->vif.p2p || 1918 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 1919 const struct cfg80211_bss_ies *ies; 1920 1921 rcu_read_lock(); 1922 ies = rcu_dereference(cbss->ies); 1923 if (ies) { 1924 int ret; 1925 1926 ret = cfg80211_get_p2p_attr( 1927 ies->data, ies->len, 1928 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 1929 (u8 *) &bss_conf->p2p_noa_attr, 1930 sizeof(bss_conf->p2p_noa_attr)); 1931 if (ret >= 2) { 1932 sdata->u.mgd.p2p_noa_index = 1933 bss_conf->p2p_noa_attr.index; 1934 bss_info_changed |= BSS_CHANGED_P2P_PS; 1935 } 1936 } 1937 rcu_read_unlock(); 1938 } 1939 1940 /* just to be sure */ 1941 ieee80211_stop_poll(sdata); 1942 1943 ieee80211_led_assoc(local, 1); 1944 1945 if (sdata->u.mgd.have_beacon) { 1946 /* 1947 * If the AP is buggy we may get here with no DTIM period 1948 * known, so assume it's 1 which is the only safe assumption 1949 * in that case, although if the TIM IE is broken powersave 1950 * probably just won't work at all. 1951 */ 1952 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1; 1953 bss_conf->beacon_rate = bss->beacon_rate; 1954 bss_info_changed |= BSS_CHANGED_BEACON_INFO; 1955 } else { 1956 bss_conf->beacon_rate = NULL; 1957 bss_conf->dtim_period = 0; 1958 } 1959 1960 bss_conf->assoc = 1; 1961 1962 /* Tell the driver to monitor connection quality (if supported) */ 1963 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 1964 bss_conf->cqm_rssi_thold) 1965 bss_info_changed |= BSS_CHANGED_CQM; 1966 1967 /* Enable ARP filtering */ 1968 if (bss_conf->arp_addr_cnt) 1969 bss_info_changed |= BSS_CHANGED_ARP_FILTER; 1970 1971 ieee80211_bss_info_change_notify(sdata, bss_info_changed); 1972 1973 mutex_lock(&local->iflist_mtx); 1974 ieee80211_recalc_ps(local); 1975 mutex_unlock(&local->iflist_mtx); 1976 1977 ieee80211_recalc_smps(sdata); 1978 ieee80211_recalc_ps_vif(sdata); 1979 1980 netif_carrier_on(sdata->dev); 1981 } 1982 1983 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 1984 u16 stype, u16 reason, bool tx, 1985 u8 *frame_buf) 1986 { 1987 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1988 struct ieee80211_local *local = sdata->local; 1989 u32 changed = 0; 1990 1991 sdata_assert_lock(sdata); 1992 1993 if (WARN_ON_ONCE(tx && !frame_buf)) 1994 return; 1995 1996 if (WARN_ON(!ifmgd->associated)) 1997 return; 1998 1999 ieee80211_stop_poll(sdata); 2000 2001 ifmgd->associated = NULL; 2002 netif_carrier_off(sdata->dev); 2003 2004 /* 2005 * if we want to get out of ps before disassoc (why?) we have 2006 * to do it before sending disassoc, as otherwise the null-packet 2007 * won't be valid. 2008 */ 2009 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2010 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2011 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2012 } 2013 local->ps_sdata = NULL; 2014 2015 /* disable per-vif ps */ 2016 ieee80211_recalc_ps_vif(sdata); 2017 2018 /* make sure ongoing transmission finishes */ 2019 synchronize_net(); 2020 2021 /* 2022 * drop any frame before deauth/disassoc, this can be data or 2023 * management frame. Since we are disconnecting, we should not 2024 * insist sending these frames which can take time and delay 2025 * the disconnection and possible the roaming. 2026 */ 2027 if (tx) 2028 ieee80211_flush_queues(local, sdata, true); 2029 2030 /* deauthenticate/disassociate now */ 2031 if (tx || frame_buf) 2032 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype, 2033 reason, tx, frame_buf); 2034 2035 /* flush out frame - make sure the deauth was actually sent */ 2036 if (tx) 2037 ieee80211_flush_queues(local, sdata, false); 2038 2039 /* clear bssid only after building the needed mgmt frames */ 2040 eth_zero_addr(ifmgd->bssid); 2041 2042 /* remove AP and TDLS peers */ 2043 sta_info_flush(sdata); 2044 2045 /* finally reset all BSS / config parameters */ 2046 changed |= ieee80211_reset_erp_info(sdata); 2047 2048 ieee80211_led_assoc(local, 0); 2049 changed |= BSS_CHANGED_ASSOC; 2050 sdata->vif.bss_conf.assoc = false; 2051 2052 ifmgd->p2p_noa_index = -1; 2053 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 2054 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 2055 2056 /* on the next assoc, re-program HT/VHT parameters */ 2057 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 2058 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 2059 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 2060 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 2061 2062 /* reset MU-MIMO ownership and group data */ 2063 memset(sdata->vif.bss_conf.mu_group.membership, 0, 2064 sizeof(sdata->vif.bss_conf.mu_group.membership)); 2065 memset(sdata->vif.bss_conf.mu_group.position, 0, 2066 sizeof(sdata->vif.bss_conf.mu_group.position)); 2067 changed |= BSS_CHANGED_MU_GROUPS; 2068 sdata->vif.mu_mimo_owner = false; 2069 2070 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 2071 2072 del_timer_sync(&local->dynamic_ps_timer); 2073 cancel_work_sync(&local->dynamic_ps_enable_work); 2074 2075 /* Disable ARP filtering */ 2076 if (sdata->vif.bss_conf.arp_addr_cnt) 2077 changed |= BSS_CHANGED_ARP_FILTER; 2078 2079 sdata->vif.bss_conf.qos = false; 2080 changed |= BSS_CHANGED_QOS; 2081 2082 /* The BSSID (not really interesting) and HT changed */ 2083 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 2084 ieee80211_bss_info_change_notify(sdata, changed); 2085 2086 /* disassociated - set to defaults now */ 2087 ieee80211_set_wmm_default(sdata, false, false); 2088 2089 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 2090 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 2091 del_timer_sync(&sdata->u.mgd.timer); 2092 del_timer_sync(&sdata->u.mgd.chswitch_timer); 2093 2094 sdata->vif.bss_conf.dtim_period = 0; 2095 sdata->vif.bss_conf.beacon_rate = NULL; 2096 2097 ifmgd->have_beacon = false; 2098 2099 ifmgd->flags = 0; 2100 mutex_lock(&local->mtx); 2101 ieee80211_vif_release_channel(sdata); 2102 2103 sdata->vif.csa_active = false; 2104 ifmgd->csa_waiting_bcn = false; 2105 ifmgd->csa_ignored_same_chan = false; 2106 if (sdata->csa_block_tx) { 2107 ieee80211_wake_vif_queues(local, sdata, 2108 IEEE80211_QUEUE_STOP_REASON_CSA); 2109 sdata->csa_block_tx = false; 2110 } 2111 mutex_unlock(&local->mtx); 2112 2113 /* existing TX TSPEC sessions no longer exist */ 2114 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 2115 cancel_delayed_work_sync(&ifmgd->tx_tspec_wk); 2116 2117 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 2118 } 2119 2120 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, 2121 struct ieee80211_hdr *hdr) 2122 { 2123 /* 2124 * We can postpone the mgd.timer whenever receiving unicast frames 2125 * from AP because we know that the connection is working both ways 2126 * at that time. But multicast frames (and hence also beacons) must 2127 * be ignored here, because we need to trigger the timer during 2128 * data idle periods for sending the periodic probe request to the 2129 * AP we're connected to. 2130 */ 2131 if (is_multicast_ether_addr(hdr->addr1)) 2132 return; 2133 2134 ieee80211_sta_reset_conn_monitor(sdata); 2135 } 2136 2137 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 2138 { 2139 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2140 struct ieee80211_local *local = sdata->local; 2141 2142 mutex_lock(&local->mtx); 2143 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 2144 goto out; 2145 2146 __ieee80211_stop_poll(sdata); 2147 2148 mutex_lock(&local->iflist_mtx); 2149 ieee80211_recalc_ps(local); 2150 mutex_unlock(&local->iflist_mtx); 2151 2152 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 2153 goto out; 2154 2155 /* 2156 * We've received a probe response, but are not sure whether 2157 * we have or will be receiving any beacons or data, so let's 2158 * schedule the timers again, just in case. 2159 */ 2160 ieee80211_sta_reset_beacon_monitor(sdata); 2161 2162 mod_timer(&ifmgd->conn_mon_timer, 2163 round_jiffies_up(jiffies + 2164 IEEE80211_CONNECTION_IDLE_TIME)); 2165 out: 2166 mutex_unlock(&local->mtx); 2167 } 2168 2169 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 2170 struct ieee80211_hdr *hdr, 2171 u16 tx_time) 2172 { 2173 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2174 u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; 2175 int ac = ieee80211_ac_from_tid(tid); 2176 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2177 unsigned long now = jiffies; 2178 2179 if (likely(!tx_tspec->admitted_time)) 2180 return; 2181 2182 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2183 tx_tspec->consumed_tx_time = 0; 2184 tx_tspec->time_slice_start = now; 2185 2186 if (tx_tspec->downgraded) { 2187 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 2188 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2189 } 2190 } 2191 2192 if (tx_tspec->downgraded) 2193 return; 2194 2195 tx_tspec->consumed_tx_time += tx_time; 2196 2197 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 2198 tx_tspec->downgraded = true; 2199 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 2200 schedule_delayed_work(&ifmgd->tx_tspec_wk, 0); 2201 } 2202 } 2203 2204 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 2205 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 2206 { 2207 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 2208 2209 if (!ieee80211_is_data(hdr->frame_control)) 2210 return; 2211 2212 if (ieee80211_is_nullfunc(hdr->frame_control) && 2213 sdata->u.mgd.probe_send_count > 0) { 2214 if (ack) 2215 ieee80211_sta_reset_conn_monitor(sdata); 2216 else 2217 sdata->u.mgd.nullfunc_failed = true; 2218 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 2219 return; 2220 } 2221 2222 if (ack) 2223 ieee80211_sta_reset_conn_monitor(sdata); 2224 } 2225 2226 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 2227 { 2228 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2229 const u8 *ssid; 2230 u8 *dst = ifmgd->associated->bssid; 2231 u8 unicast_limit = max(1, max_probe_tries - 3); 2232 struct sta_info *sta; 2233 2234 /* 2235 * Try sending broadcast probe requests for the last three 2236 * probe requests after the first ones failed since some 2237 * buggy APs only support broadcast probe requests. 2238 */ 2239 if (ifmgd->probe_send_count >= unicast_limit) 2240 dst = NULL; 2241 2242 /* 2243 * When the hardware reports an accurate Tx ACK status, it's 2244 * better to send a nullfunc frame instead of a probe request, 2245 * as it will kick us off the AP quickly if we aren't associated 2246 * anymore. The timeout will be reset if the frame is ACKed by 2247 * the AP. 2248 */ 2249 ifmgd->probe_send_count++; 2250 2251 if (dst) { 2252 mutex_lock(&sdata->local->sta_mtx); 2253 sta = sta_info_get(sdata, dst); 2254 if (!WARN_ON(!sta)) 2255 ieee80211_check_fast_rx(sta); 2256 mutex_unlock(&sdata->local->sta_mtx); 2257 } 2258 2259 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 2260 ifmgd->nullfunc_failed = false; 2261 ieee80211_send_nullfunc(sdata->local, sdata, false); 2262 } else { 2263 int ssid_len; 2264 2265 rcu_read_lock(); 2266 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID); 2267 if (WARN_ON_ONCE(ssid == NULL)) 2268 ssid_len = 0; 2269 else 2270 ssid_len = ssid[1]; 2271 2272 ieee80211_send_probe_req(sdata, sdata->vif.addr, dst, 2273 ssid + 2, ssid_len, NULL, 2274 0, (u32) -1, true, 0, 2275 ifmgd->associated->channel, false); 2276 rcu_read_unlock(); 2277 } 2278 2279 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 2280 run_again(sdata, ifmgd->probe_timeout); 2281 } 2282 2283 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 2284 bool beacon) 2285 { 2286 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2287 bool already = false; 2288 2289 if (!ieee80211_sdata_running(sdata)) 2290 return; 2291 2292 sdata_lock(sdata); 2293 2294 if (!ifmgd->associated) 2295 goto out; 2296 2297 mutex_lock(&sdata->local->mtx); 2298 2299 if (sdata->local->tmp_channel || sdata->local->scanning) { 2300 mutex_unlock(&sdata->local->mtx); 2301 goto out; 2302 } 2303 2304 if (beacon) { 2305 mlme_dbg_ratelimited(sdata, 2306 "detected beacon loss from AP (missed %d beacons) - probing\n", 2307 beacon_loss_count); 2308 2309 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 2310 } 2311 2312 /* 2313 * The driver/our work has already reported this event or the 2314 * connection monitoring has kicked in and we have already sent 2315 * a probe request. Or maybe the AP died and the driver keeps 2316 * reporting until we disassociate... 2317 * 2318 * In either case we have to ignore the current call to this 2319 * function (except for setting the correct probe reason bit) 2320 * because otherwise we would reset the timer every time and 2321 * never check whether we received a probe response! 2322 */ 2323 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2324 already = true; 2325 2326 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 2327 2328 mutex_unlock(&sdata->local->mtx); 2329 2330 if (already) 2331 goto out; 2332 2333 mutex_lock(&sdata->local->iflist_mtx); 2334 ieee80211_recalc_ps(sdata->local); 2335 mutex_unlock(&sdata->local->iflist_mtx); 2336 2337 ifmgd->probe_send_count = 0; 2338 ieee80211_mgd_probe_ap_send(sdata); 2339 out: 2340 sdata_unlock(sdata); 2341 } 2342 2343 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2344 struct ieee80211_vif *vif) 2345 { 2346 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2347 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2348 struct cfg80211_bss *cbss; 2349 struct sk_buff *skb; 2350 const u8 *ssid; 2351 int ssid_len; 2352 2353 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2354 return NULL; 2355 2356 sdata_assert_lock(sdata); 2357 2358 if (ifmgd->associated) 2359 cbss = ifmgd->associated; 2360 else if (ifmgd->auth_data) 2361 cbss = ifmgd->auth_data->bss; 2362 else if (ifmgd->assoc_data) 2363 cbss = ifmgd->assoc_data->bss; 2364 else 2365 return NULL; 2366 2367 rcu_read_lock(); 2368 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID); 2369 if (WARN_ON_ONCE(ssid == NULL)) 2370 ssid_len = 0; 2371 else 2372 ssid_len = ssid[1]; 2373 2374 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 2375 (u32) -1, cbss->channel, 2376 ssid + 2, ssid_len, 2377 NULL, 0, true); 2378 rcu_read_unlock(); 2379 2380 return skb; 2381 } 2382 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 2383 2384 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 2385 const u8 *buf, size_t len, bool tx, 2386 u16 reason) 2387 { 2388 struct ieee80211_event event = { 2389 .type = MLME_EVENT, 2390 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 2391 .u.mlme.reason = reason, 2392 }; 2393 2394 if (tx) 2395 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len); 2396 else 2397 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 2398 2399 drv_event_callback(sdata->local, sdata, &event); 2400 } 2401 2402 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 2403 { 2404 struct ieee80211_local *local = sdata->local; 2405 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2406 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 2407 2408 sdata_lock(sdata); 2409 if (!ifmgd->associated) { 2410 sdata_unlock(sdata); 2411 return; 2412 } 2413 2414 /* AP is probably out of range (or not reachable for another reason) so 2415 * remove the bss struct for that AP. 2416 */ 2417 cfg80211_unlink_bss(local->hw.wiphy, ifmgd->associated); 2418 2419 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 2420 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 2421 true, frame_buf); 2422 mutex_lock(&local->mtx); 2423 sdata->vif.csa_active = false; 2424 ifmgd->csa_waiting_bcn = false; 2425 if (sdata->csa_block_tx) { 2426 ieee80211_wake_vif_queues(local, sdata, 2427 IEEE80211_QUEUE_STOP_REASON_CSA); 2428 sdata->csa_block_tx = false; 2429 } 2430 mutex_unlock(&local->mtx); 2431 2432 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 2433 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY); 2434 2435 sdata_unlock(sdata); 2436 } 2437 2438 static void ieee80211_beacon_connection_loss_work(struct work_struct *work) 2439 { 2440 struct ieee80211_sub_if_data *sdata = 2441 container_of(work, struct ieee80211_sub_if_data, 2442 u.mgd.beacon_connection_loss_work); 2443 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2444 2445 if (ifmgd->associated) 2446 ifmgd->beacon_loss_count++; 2447 2448 if (ifmgd->connection_loss) { 2449 sdata_info(sdata, "Connection to AP %pM lost\n", 2450 ifmgd->bssid); 2451 __ieee80211_disconnect(sdata); 2452 } else { 2453 ieee80211_mgd_probe_ap(sdata, true); 2454 } 2455 } 2456 2457 static void ieee80211_csa_connection_drop_work(struct work_struct *work) 2458 { 2459 struct ieee80211_sub_if_data *sdata = 2460 container_of(work, struct ieee80211_sub_if_data, 2461 u.mgd.csa_connection_drop_work); 2462 2463 __ieee80211_disconnect(sdata); 2464 } 2465 2466 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 2467 { 2468 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2469 struct ieee80211_hw *hw = &sdata->local->hw; 2470 2471 trace_api_beacon_loss(sdata); 2472 2473 sdata->u.mgd.connection_loss = false; 2474 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2475 } 2476 EXPORT_SYMBOL(ieee80211_beacon_loss); 2477 2478 void ieee80211_connection_loss(struct ieee80211_vif *vif) 2479 { 2480 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2481 struct ieee80211_hw *hw = &sdata->local->hw; 2482 2483 trace_api_connection_loss(sdata); 2484 2485 sdata->u.mgd.connection_loss = true; 2486 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work); 2487 } 2488 EXPORT_SYMBOL(ieee80211_connection_loss); 2489 2490 2491 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 2492 bool assoc) 2493 { 2494 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2495 2496 sdata_assert_lock(sdata); 2497 2498 if (!assoc) { 2499 /* 2500 * we are not authenticated yet, the only timer that could be 2501 * running is the timeout for the authentication response which 2502 * which is not relevant anymore. 2503 */ 2504 del_timer_sync(&sdata->u.mgd.timer); 2505 sta_info_destroy_addr(sdata, auth_data->bss->bssid); 2506 2507 eth_zero_addr(sdata->u.mgd.bssid); 2508 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2509 sdata->u.mgd.flags = 0; 2510 mutex_lock(&sdata->local->mtx); 2511 ieee80211_vif_release_channel(sdata); 2512 mutex_unlock(&sdata->local->mtx); 2513 } 2514 2515 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 2516 kfree(auth_data); 2517 sdata->u.mgd.auth_data = NULL; 2518 } 2519 2520 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 2521 bool assoc, bool abandon) 2522 { 2523 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 2524 2525 sdata_assert_lock(sdata); 2526 2527 if (!assoc) { 2528 /* 2529 * we are not associated yet, the only timer that could be 2530 * running is the timeout for the association response which 2531 * which is not relevant anymore. 2532 */ 2533 del_timer_sync(&sdata->u.mgd.timer); 2534 sta_info_destroy_addr(sdata, assoc_data->bss->bssid); 2535 2536 eth_zero_addr(sdata->u.mgd.bssid); 2537 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 2538 sdata->u.mgd.flags = 0; 2539 sdata->vif.mu_mimo_owner = false; 2540 2541 mutex_lock(&sdata->local->mtx); 2542 ieee80211_vif_release_channel(sdata); 2543 mutex_unlock(&sdata->local->mtx); 2544 2545 if (abandon) 2546 cfg80211_abandon_assoc(sdata->dev, assoc_data->bss); 2547 } 2548 2549 kfree(assoc_data); 2550 sdata->u.mgd.assoc_data = NULL; 2551 } 2552 2553 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 2554 struct ieee80211_mgmt *mgmt, size_t len) 2555 { 2556 struct ieee80211_local *local = sdata->local; 2557 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 2558 u8 *pos; 2559 struct ieee802_11_elems elems; 2560 u32 tx_flags = 0; 2561 2562 pos = mgmt->u.auth.variable; 2563 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2564 if (!elems.challenge) 2565 return; 2566 auth_data->expected_transaction = 4; 2567 drv_mgd_prepare_tx(sdata->local, sdata); 2568 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2569 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 2570 IEEE80211_TX_INTFL_MLME_CONN_TX; 2571 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 2572 elems.challenge - 2, elems.challenge_len + 2, 2573 auth_data->bss->bssid, auth_data->bss->bssid, 2574 auth_data->key, auth_data->key_len, 2575 auth_data->key_idx, tx_flags); 2576 } 2577 2578 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 2579 struct ieee80211_mgmt *mgmt, size_t len) 2580 { 2581 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2582 u8 bssid[ETH_ALEN]; 2583 u16 auth_alg, auth_transaction, status_code; 2584 struct sta_info *sta; 2585 struct ieee80211_event event = { 2586 .type = MLME_EVENT, 2587 .u.mlme.data = AUTH_EVENT, 2588 }; 2589 2590 sdata_assert_lock(sdata); 2591 2592 if (len < 24 + 6) 2593 return; 2594 2595 if (!ifmgd->auth_data || ifmgd->auth_data->done) 2596 return; 2597 2598 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 2599 2600 if (!ether_addr_equal(bssid, mgmt->bssid)) 2601 return; 2602 2603 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 2604 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 2605 status_code = le16_to_cpu(mgmt->u.auth.status_code); 2606 2607 if (auth_alg != ifmgd->auth_data->algorithm || 2608 auth_transaction != ifmgd->auth_data->expected_transaction) { 2609 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 2610 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 2611 auth_transaction, 2612 ifmgd->auth_data->expected_transaction); 2613 return; 2614 } 2615 2616 if (status_code != WLAN_STATUS_SUCCESS) { 2617 sdata_info(sdata, "%pM denied authentication (status %d)\n", 2618 mgmt->sa, status_code); 2619 ieee80211_destroy_auth_data(sdata, false); 2620 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2621 event.u.mlme.status = MLME_DENIED; 2622 event.u.mlme.reason = status_code; 2623 drv_event_callback(sdata->local, sdata, &event); 2624 return; 2625 } 2626 2627 switch (ifmgd->auth_data->algorithm) { 2628 case WLAN_AUTH_OPEN: 2629 case WLAN_AUTH_LEAP: 2630 case WLAN_AUTH_FT: 2631 case WLAN_AUTH_SAE: 2632 case WLAN_AUTH_FILS_SK: 2633 case WLAN_AUTH_FILS_SK_PFS: 2634 case WLAN_AUTH_FILS_PK: 2635 break; 2636 case WLAN_AUTH_SHARED_KEY: 2637 if (ifmgd->auth_data->expected_transaction != 4) { 2638 ieee80211_auth_challenge(sdata, mgmt, len); 2639 /* need another frame */ 2640 return; 2641 } 2642 break; 2643 default: 2644 WARN_ONCE(1, "invalid auth alg %d", 2645 ifmgd->auth_data->algorithm); 2646 return; 2647 } 2648 2649 event.u.mlme.status = MLME_SUCCESS; 2650 drv_event_callback(sdata->local, sdata, &event); 2651 sdata_info(sdata, "authenticated\n"); 2652 ifmgd->auth_data->done = true; 2653 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 2654 ifmgd->auth_data->timeout_started = true; 2655 run_again(sdata, ifmgd->auth_data->timeout); 2656 2657 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 2658 ifmgd->auth_data->expected_transaction != 2) { 2659 /* 2660 * Report auth frame to user space for processing since another 2661 * round of Authentication frames is still needed. 2662 */ 2663 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2664 return; 2665 } 2666 2667 /* move station state to auth */ 2668 mutex_lock(&sdata->local->sta_mtx); 2669 sta = sta_info_get(sdata, bssid); 2670 if (!sta) { 2671 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid); 2672 goto out_err; 2673 } 2674 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 2675 sdata_info(sdata, "failed moving %pM to auth\n", bssid); 2676 goto out_err; 2677 } 2678 mutex_unlock(&sdata->local->sta_mtx); 2679 2680 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2681 return; 2682 out_err: 2683 mutex_unlock(&sdata->local->sta_mtx); 2684 /* ignore frame -- wait for timeout */ 2685 } 2686 2687 #define case_WLAN(type) \ 2688 case WLAN_REASON_##type: return #type 2689 2690 static const char *ieee80211_get_reason_code_string(u16 reason_code) 2691 { 2692 switch (reason_code) { 2693 case_WLAN(UNSPECIFIED); 2694 case_WLAN(PREV_AUTH_NOT_VALID); 2695 case_WLAN(DEAUTH_LEAVING); 2696 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 2697 case_WLAN(DISASSOC_AP_BUSY); 2698 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 2699 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 2700 case_WLAN(DISASSOC_STA_HAS_LEFT); 2701 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 2702 case_WLAN(DISASSOC_BAD_POWER); 2703 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 2704 case_WLAN(INVALID_IE); 2705 case_WLAN(MIC_FAILURE); 2706 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 2707 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 2708 case_WLAN(IE_DIFFERENT); 2709 case_WLAN(INVALID_GROUP_CIPHER); 2710 case_WLAN(INVALID_PAIRWISE_CIPHER); 2711 case_WLAN(INVALID_AKMP); 2712 case_WLAN(UNSUPP_RSN_VERSION); 2713 case_WLAN(INVALID_RSN_IE_CAP); 2714 case_WLAN(IEEE8021X_FAILED); 2715 case_WLAN(CIPHER_SUITE_REJECTED); 2716 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 2717 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 2718 case_WLAN(DISASSOC_LOW_ACK); 2719 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 2720 case_WLAN(QSTA_LEAVE_QBSS); 2721 case_WLAN(QSTA_NOT_USE); 2722 case_WLAN(QSTA_REQUIRE_SETUP); 2723 case_WLAN(QSTA_TIMEOUT); 2724 case_WLAN(QSTA_CIPHER_NOT_SUPP); 2725 case_WLAN(MESH_PEER_CANCELED); 2726 case_WLAN(MESH_MAX_PEERS); 2727 case_WLAN(MESH_CONFIG); 2728 case_WLAN(MESH_CLOSE); 2729 case_WLAN(MESH_MAX_RETRIES); 2730 case_WLAN(MESH_CONFIRM_TIMEOUT); 2731 case_WLAN(MESH_INVALID_GTK); 2732 case_WLAN(MESH_INCONSISTENT_PARAM); 2733 case_WLAN(MESH_INVALID_SECURITY); 2734 case_WLAN(MESH_PATH_ERROR); 2735 case_WLAN(MESH_PATH_NOFORWARD); 2736 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 2737 case_WLAN(MAC_EXISTS_IN_MBSS); 2738 case_WLAN(MESH_CHAN_REGULATORY); 2739 case_WLAN(MESH_CHAN); 2740 default: return "<unknown>"; 2741 } 2742 } 2743 2744 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 2745 struct ieee80211_mgmt *mgmt, size_t len) 2746 { 2747 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2748 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 2749 2750 sdata_assert_lock(sdata); 2751 2752 if (len < 24 + 2) 2753 return; 2754 2755 if (ifmgd->associated && 2756 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) { 2757 const u8 *bssid = ifmgd->associated->bssid; 2758 2759 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 2760 bssid, reason_code, 2761 ieee80211_get_reason_code_string(reason_code)); 2762 2763 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2764 2765 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 2766 reason_code); 2767 return; 2768 } 2769 2770 if (ifmgd->assoc_data && 2771 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 2772 const u8 *bssid = ifmgd->assoc_data->bss->bssid; 2773 2774 sdata_info(sdata, 2775 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 2776 bssid, reason_code, 2777 ieee80211_get_reason_code_string(reason_code)); 2778 2779 ieee80211_destroy_assoc_data(sdata, false, true); 2780 2781 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 2782 return; 2783 } 2784 } 2785 2786 2787 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 2788 struct ieee80211_mgmt *mgmt, size_t len) 2789 { 2790 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2791 u16 reason_code; 2792 2793 sdata_assert_lock(sdata); 2794 2795 if (len < 24 + 2) 2796 return; 2797 2798 if (!ifmgd->associated || 2799 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 2800 return; 2801 2802 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 2803 2804 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n", 2805 mgmt->sa, reason_code); 2806 2807 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 2808 2809 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code); 2810 } 2811 2812 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 2813 u8 *supp_rates, unsigned int supp_rates_len, 2814 u32 *rates, u32 *basic_rates, 2815 bool *have_higher_than_11mbit, 2816 int *min_rate, int *min_rate_index, 2817 int shift, u32 rate_flags) 2818 { 2819 int i, j; 2820 2821 for (i = 0; i < supp_rates_len; i++) { 2822 int rate = supp_rates[i] & 0x7f; 2823 bool is_basic = !!(supp_rates[i] & 0x80); 2824 2825 if ((rate * 5 * (1 << shift)) > 110) 2826 *have_higher_than_11mbit = true; 2827 2828 /* 2829 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009 2830 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it. 2831 * 2832 * Note: Even through the membership selector and the basic 2833 * rate flag share the same bit, they are not exactly 2834 * the same. 2835 */ 2836 if (!!(supp_rates[i] & 0x80) && 2837 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) 2838 continue; 2839 2840 for (j = 0; j < sband->n_bitrates; j++) { 2841 struct ieee80211_rate *br; 2842 int brate; 2843 2844 br = &sband->bitrates[j]; 2845 if ((rate_flags & br->flags) != rate_flags) 2846 continue; 2847 2848 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 2849 if (brate == rate) { 2850 *rates |= BIT(j); 2851 if (is_basic) 2852 *basic_rates |= BIT(j); 2853 if ((rate * 5) < *min_rate) { 2854 *min_rate = rate * 5; 2855 *min_rate_index = j; 2856 } 2857 break; 2858 } 2859 } 2860 } 2861 } 2862 2863 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 2864 struct cfg80211_bss *cbss, 2865 struct ieee80211_mgmt *mgmt, size_t len) 2866 { 2867 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2868 struct ieee80211_local *local = sdata->local; 2869 struct ieee80211_supported_band *sband; 2870 struct sta_info *sta; 2871 u8 *pos; 2872 u16 capab_info, aid; 2873 struct ieee802_11_elems elems; 2874 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 2875 const struct cfg80211_bss_ies *bss_ies = NULL; 2876 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2877 u32 changed = 0; 2878 int err; 2879 bool ret; 2880 2881 /* AssocResp and ReassocResp have identical structure */ 2882 2883 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 2884 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 2885 2886 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) 2887 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n", 2888 aid); 2889 aid &= ~(BIT(15) | BIT(14)); 2890 2891 ifmgd->broken_ap = false; 2892 2893 if (aid == 0 || aid > IEEE80211_MAX_AID) { 2894 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n", 2895 aid); 2896 aid = 0; 2897 ifmgd->broken_ap = true; 2898 } 2899 2900 pos = mgmt->u.assoc_resp.variable; 2901 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 2902 2903 if (!elems.supp_rates) { 2904 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 2905 return false; 2906 } 2907 2908 ifmgd->aid = aid; 2909 ifmgd->tdls_chan_switch_prohibited = 2910 elems.ext_capab && elems.ext_capab_len >= 5 && 2911 (elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 2912 2913 /* 2914 * Some APs are erroneously not including some information in their 2915 * (re)association response frames. Try to recover by using the data 2916 * from the beacon or probe response. This seems to afflict mobile 2917 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 2918 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 2919 */ 2920 if ((assoc_data->wmm && !elems.wmm_param) || 2921 (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 2922 (!elems.ht_cap_elem || !elems.ht_operation)) || 2923 (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 2924 (!elems.vht_cap_elem || !elems.vht_operation))) { 2925 const struct cfg80211_bss_ies *ies; 2926 struct ieee802_11_elems bss_elems; 2927 2928 rcu_read_lock(); 2929 ies = rcu_dereference(cbss->ies); 2930 if (ies) 2931 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 2932 GFP_ATOMIC); 2933 rcu_read_unlock(); 2934 if (!bss_ies) 2935 return false; 2936 2937 ieee802_11_parse_elems(bss_ies->data, bss_ies->len, 2938 false, &bss_elems); 2939 if (assoc_data->wmm && 2940 !elems.wmm_param && bss_elems.wmm_param) { 2941 elems.wmm_param = bss_elems.wmm_param; 2942 sdata_info(sdata, 2943 "AP bug: WMM param missing from AssocResp\n"); 2944 } 2945 2946 /* 2947 * Also check if we requested HT/VHT, otherwise the AP doesn't 2948 * have to include the IEs in the (re)association response. 2949 */ 2950 if (!elems.ht_cap_elem && bss_elems.ht_cap_elem && 2951 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 2952 elems.ht_cap_elem = bss_elems.ht_cap_elem; 2953 sdata_info(sdata, 2954 "AP bug: HT capability missing from AssocResp\n"); 2955 } 2956 if (!elems.ht_operation && bss_elems.ht_operation && 2957 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 2958 elems.ht_operation = bss_elems.ht_operation; 2959 sdata_info(sdata, 2960 "AP bug: HT operation missing from AssocResp\n"); 2961 } 2962 if (!elems.vht_cap_elem && bss_elems.vht_cap_elem && 2963 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 2964 elems.vht_cap_elem = bss_elems.vht_cap_elem; 2965 sdata_info(sdata, 2966 "AP bug: VHT capa missing from AssocResp\n"); 2967 } 2968 if (!elems.vht_operation && bss_elems.vht_operation && 2969 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { 2970 elems.vht_operation = bss_elems.vht_operation; 2971 sdata_info(sdata, 2972 "AP bug: VHT operation missing from AssocResp\n"); 2973 } 2974 } 2975 2976 /* 2977 * We previously checked these in the beacon/probe response, so 2978 * they should be present here. This is just a safety net. 2979 */ 2980 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 2981 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) { 2982 sdata_info(sdata, 2983 "HT AP is missing WMM params or HT capability/operation\n"); 2984 ret = false; 2985 goto out; 2986 } 2987 2988 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 2989 (!elems.vht_cap_elem || !elems.vht_operation)) { 2990 sdata_info(sdata, 2991 "VHT AP is missing VHT capability/operation\n"); 2992 ret = false; 2993 goto out; 2994 } 2995 2996 mutex_lock(&sdata->local->sta_mtx); 2997 /* 2998 * station info was already allocated and inserted before 2999 * the association and should be available to us 3000 */ 3001 sta = sta_info_get(sdata, cbss->bssid); 3002 if (WARN_ON(!sta)) { 3003 mutex_unlock(&sdata->local->sta_mtx); 3004 ret = false; 3005 goto out; 3006 } 3007 3008 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)]; 3009 3010 /* Set up internal HT/VHT capabilities */ 3011 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) 3012 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 3013 elems.ht_cap_elem, sta); 3014 3015 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) 3016 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 3017 elems.vht_cap_elem, sta); 3018 3019 /* 3020 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 3021 * in their association response, so ignore that data for our own 3022 * configuration. If it changed since the last beacon, we'll get the 3023 * next beacon and update then. 3024 */ 3025 3026 /* 3027 * If an operating mode notification IE is present, override the 3028 * NSS calculation (that would be done in rate_control_rate_init()) 3029 * and use the # of streams from that element. 3030 */ 3031 if (elems.opmode_notif && 3032 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 3033 u8 nss; 3034 3035 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 3036 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 3037 nss += 1; 3038 sta->sta.rx_nss = nss; 3039 } 3040 3041 rate_control_rate_init(sta); 3042 3043 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 3044 set_sta_flag(sta, WLAN_STA_MFP); 3045 sta->sta.mfp = true; 3046 } else { 3047 sta->sta.mfp = false; 3048 } 3049 3050 sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS; 3051 3052 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 3053 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 3054 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 3055 if (err) { 3056 sdata_info(sdata, 3057 "failed to move station %pM to desired state\n", 3058 sta->sta.addr); 3059 WARN_ON(__sta_info_destroy(sta)); 3060 mutex_unlock(&sdata->local->sta_mtx); 3061 ret = false; 3062 goto out; 3063 } 3064 3065 mutex_unlock(&sdata->local->sta_mtx); 3066 3067 /* 3068 * Always handle WMM once after association regardless 3069 * of the first value the AP uses. Setting -1 here has 3070 * that effect because the AP values is an unsigned 3071 * 4-bit value. 3072 */ 3073 ifmgd->wmm_last_param_set = -1; 3074 3075 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 3076 ieee80211_set_wmm_default(sdata, false, false); 3077 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3078 elems.wmm_param_len)) { 3079 /* still enable QoS since we might have HT/VHT */ 3080 ieee80211_set_wmm_default(sdata, false, true); 3081 /* set the disable-WMM flag in this case to disable 3082 * tracking WMM parameter changes in the beacon if 3083 * the parameters weren't actually valid. Doing so 3084 * avoids changing parameters very strangely when 3085 * the AP is going back and forth between valid and 3086 * invalid parameters. 3087 */ 3088 ifmgd->flags |= IEEE80211_STA_DISABLE_WMM; 3089 } 3090 changed |= BSS_CHANGED_QOS; 3091 3092 /* set AID and assoc capability, 3093 * ieee80211_set_associated() will tell the driver */ 3094 bss_conf->aid = aid; 3095 bss_conf->assoc_capability = capab_info; 3096 ieee80211_set_associated(sdata, cbss, changed); 3097 3098 /* 3099 * If we're using 4-addr mode, let the AP know that we're 3100 * doing so, so that it can create the STA VLAN on its side 3101 */ 3102 if (ifmgd->use_4addr) 3103 ieee80211_send_4addr_nullfunc(local, sdata); 3104 3105 /* 3106 * Start timer to probe the connection to the AP now. 3107 * Also start the timer that will detect beacon loss. 3108 */ 3109 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt); 3110 ieee80211_sta_reset_beacon_monitor(sdata); 3111 3112 ret = true; 3113 out: 3114 kfree(bss_ies); 3115 return ret; 3116 } 3117 3118 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 3119 struct ieee80211_mgmt *mgmt, 3120 size_t len) 3121 { 3122 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3123 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 3124 u16 capab_info, status_code, aid; 3125 struct ieee802_11_elems elems; 3126 int ac, uapsd_queues = -1; 3127 u8 *pos; 3128 bool reassoc; 3129 struct cfg80211_bss *bss; 3130 struct ieee80211_event event = { 3131 .type = MLME_EVENT, 3132 .u.mlme.data = ASSOC_EVENT, 3133 }; 3134 3135 sdata_assert_lock(sdata); 3136 3137 if (!assoc_data) 3138 return; 3139 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid)) 3140 return; 3141 3142 /* 3143 * AssocResp and ReassocResp have identical structure, so process both 3144 * of them in this function. 3145 */ 3146 3147 if (len < 24 + 6) 3148 return; 3149 3150 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control); 3151 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 3152 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 3153 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 3154 3155 sdata_info(sdata, 3156 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 3157 reassoc ? "Rea" : "A", mgmt->sa, 3158 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 3159 3160 if (assoc_data->fils_kek_len && 3161 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 3162 return; 3163 3164 pos = mgmt->u.assoc_resp.variable; 3165 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems); 3166 3167 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 3168 elems.timeout_int && 3169 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 3170 u32 tu, ms; 3171 tu = le32_to_cpu(elems.timeout_int->value); 3172 ms = tu * 1024 / 1000; 3173 sdata_info(sdata, 3174 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 3175 mgmt->sa, tu, ms); 3176 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 3177 assoc_data->timeout_started = true; 3178 if (ms > IEEE80211_ASSOC_TIMEOUT) 3179 run_again(sdata, assoc_data->timeout); 3180 return; 3181 } 3182 3183 bss = assoc_data->bss; 3184 3185 if (status_code != WLAN_STATUS_SUCCESS) { 3186 sdata_info(sdata, "%pM denied association (code=%d)\n", 3187 mgmt->sa, status_code); 3188 ieee80211_destroy_assoc_data(sdata, false, false); 3189 event.u.mlme.status = MLME_DENIED; 3190 event.u.mlme.reason = status_code; 3191 drv_event_callback(sdata->local, sdata, &event); 3192 } else { 3193 if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) { 3194 /* oops -- internal error -- send timeout for now */ 3195 ieee80211_destroy_assoc_data(sdata, false, false); 3196 cfg80211_assoc_timeout(sdata->dev, bss); 3197 return; 3198 } 3199 event.u.mlme.status = MLME_SUCCESS; 3200 drv_event_callback(sdata->local, sdata, &event); 3201 sdata_info(sdata, "associated\n"); 3202 3203 /* 3204 * destroy assoc_data afterwards, as otherwise an idle 3205 * recalc after assoc_data is NULL but before associated 3206 * is set can cause the interface to go idle 3207 */ 3208 ieee80211_destroy_assoc_data(sdata, true, false); 3209 3210 /* get uapsd queues configuration */ 3211 uapsd_queues = 0; 3212 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3213 if (sdata->tx_conf[ac].uapsd) 3214 uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 3215 } 3216 3217 cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues); 3218 } 3219 3220 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, 3221 struct ieee80211_mgmt *mgmt, size_t len, 3222 struct ieee80211_rx_status *rx_status, 3223 struct ieee802_11_elems *elems) 3224 { 3225 struct ieee80211_local *local = sdata->local; 3226 struct ieee80211_bss *bss; 3227 struct ieee80211_channel *channel; 3228 3229 sdata_assert_lock(sdata); 3230 3231 channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); 3232 if (!channel) 3233 return; 3234 3235 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, 3236 channel); 3237 if (bss) { 3238 sdata->vif.bss_conf.beacon_rate = bss->beacon_rate; 3239 ieee80211_rx_bss_put(local, bss); 3240 } 3241 } 3242 3243 3244 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, 3245 struct sk_buff *skb) 3246 { 3247 struct ieee80211_mgmt *mgmt = (void *)skb->data; 3248 struct ieee80211_if_managed *ifmgd; 3249 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 3250 size_t baselen, len = skb->len; 3251 struct ieee802_11_elems elems; 3252 3253 ifmgd = &sdata->u.mgd; 3254 3255 sdata_assert_lock(sdata); 3256 3257 if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) 3258 return; /* ignore ProbeResp to foreign address */ 3259 3260 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 3261 if (baselen > len) 3262 return; 3263 3264 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, 3265 false, &elems); 3266 3267 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3268 3269 if (ifmgd->associated && 3270 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3271 ieee80211_reset_ap_probe(sdata); 3272 } 3273 3274 /* 3275 * This is the canonical list of information elements we care about, 3276 * the filter code also gives us all changes to the Microsoft OUI 3277 * (00:50:F2) vendor IE which is used for WMM which we need to track, 3278 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 3279 * changes to requested client power. 3280 * 3281 * We implement beacon filtering in software since that means we can 3282 * avoid processing the frame here and in cfg80211, and userspace 3283 * will not be able to tell whether the hardware supports it or not. 3284 * 3285 * XXX: This list needs to be dynamic -- userspace needs to be able to 3286 * add items it requires. It also needs to be able to tell us to 3287 * look out for other vendor IEs. 3288 */ 3289 static const u64 care_about_ies = 3290 (1ULL << WLAN_EID_COUNTRY) | 3291 (1ULL << WLAN_EID_ERP_INFO) | 3292 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 3293 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 3294 (1ULL << WLAN_EID_HT_CAPABILITY) | 3295 (1ULL << WLAN_EID_HT_OPERATION) | 3296 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 3297 3298 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, 3299 struct ieee80211_mgmt *mgmt, size_t len, 3300 struct ieee80211_rx_status *rx_status) 3301 { 3302 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3303 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3304 size_t baselen; 3305 struct ieee802_11_elems elems; 3306 struct ieee80211_local *local = sdata->local; 3307 struct ieee80211_chanctx_conf *chanctx_conf; 3308 struct ieee80211_channel *chan; 3309 struct sta_info *sta; 3310 u32 changed = 0; 3311 bool erp_valid; 3312 u8 erp_value = 0; 3313 u32 ncrc; 3314 u8 *bssid; 3315 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3316 3317 sdata_assert_lock(sdata); 3318 3319 /* Process beacon from the current BSS */ 3320 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; 3321 if (baselen > len) 3322 return; 3323 3324 rcu_read_lock(); 3325 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 3326 if (!chanctx_conf) { 3327 rcu_read_unlock(); 3328 return; 3329 } 3330 3331 if (rx_status->freq != chanctx_conf->def.chan->center_freq) { 3332 rcu_read_unlock(); 3333 return; 3334 } 3335 chan = chanctx_conf->def.chan; 3336 rcu_read_unlock(); 3337 3338 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 3339 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) { 3340 ieee802_11_parse_elems(mgmt->u.beacon.variable, 3341 len - baselen, false, &elems); 3342 3343 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3344 if (elems.tim && !elems.parse_error) { 3345 const struct ieee80211_tim_ie *tim_ie = elems.tim; 3346 ifmgd->dtim_period = tim_ie->dtim_period; 3347 } 3348 ifmgd->have_beacon = true; 3349 ifmgd->assoc_data->need_beacon = false; 3350 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3351 sdata->vif.bss_conf.sync_tsf = 3352 le64_to_cpu(mgmt->u.beacon.timestamp); 3353 sdata->vif.bss_conf.sync_device_ts = 3354 rx_status->device_timestamp; 3355 if (elems.tim) 3356 sdata->vif.bss_conf.sync_dtim_count = 3357 elems.tim->dtim_count; 3358 else 3359 sdata->vif.bss_conf.sync_dtim_count = 0; 3360 } 3361 /* continue assoc process */ 3362 ifmgd->assoc_data->timeout = jiffies; 3363 ifmgd->assoc_data->timeout_started = true; 3364 run_again(sdata, ifmgd->assoc_data->timeout); 3365 return; 3366 } 3367 3368 if (!ifmgd->associated || 3369 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid)) 3370 return; 3371 bssid = ifmgd->associated->bssid; 3372 3373 /* Track average RSSI from the Beacon frames of the current AP */ 3374 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) { 3375 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE; 3376 ewma_beacon_signal_init(&ifmgd->ave_beacon_signal); 3377 ifmgd->last_cqm_event_signal = 0; 3378 ifmgd->count_beacon_signal = 1; 3379 ifmgd->last_ave_beacon_signal = 0; 3380 } else { 3381 ifmgd->count_beacon_signal++; 3382 } 3383 3384 ewma_beacon_signal_add(&ifmgd->ave_beacon_signal, -rx_status->signal); 3385 3386 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 3387 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 3388 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3389 int last_sig = ifmgd->last_ave_beacon_signal; 3390 struct ieee80211_event event = { 3391 .type = RSSI_EVENT, 3392 }; 3393 3394 /* 3395 * if signal crosses either of the boundaries, invoke callback 3396 * with appropriate parameters 3397 */ 3398 if (sig > ifmgd->rssi_max_thold && 3399 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 3400 ifmgd->last_ave_beacon_signal = sig; 3401 event.u.rssi.data = RSSI_EVENT_HIGH; 3402 drv_event_callback(local, sdata, &event); 3403 } else if (sig < ifmgd->rssi_min_thold && 3404 (last_sig >= ifmgd->rssi_max_thold || 3405 last_sig == 0)) { 3406 ifmgd->last_ave_beacon_signal = sig; 3407 event.u.rssi.data = RSSI_EVENT_LOW; 3408 drv_event_callback(local, sdata, &event); 3409 } 3410 } 3411 3412 if (bss_conf->cqm_rssi_thold && 3413 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 3414 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 3415 int sig = -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3416 int last_event = ifmgd->last_cqm_event_signal; 3417 int thold = bss_conf->cqm_rssi_thold; 3418 int hyst = bss_conf->cqm_rssi_hyst; 3419 3420 if (sig < thold && 3421 (last_event == 0 || sig < last_event - hyst)) { 3422 ifmgd->last_cqm_event_signal = sig; 3423 ieee80211_cqm_rssi_notify( 3424 &sdata->vif, 3425 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 3426 GFP_KERNEL); 3427 } else if (sig > thold && 3428 (last_event == 0 || sig > last_event + hyst)) { 3429 ifmgd->last_cqm_event_signal = sig; 3430 ieee80211_cqm_rssi_notify( 3431 &sdata->vif, 3432 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 3433 GFP_KERNEL); 3434 } 3435 } 3436 3437 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 3438 mlme_dbg_ratelimited(sdata, 3439 "cancelling AP probe due to a received beacon\n"); 3440 ieee80211_reset_ap_probe(sdata); 3441 } 3442 3443 /* 3444 * Push the beacon loss detection into the future since 3445 * we are processing a beacon from the AP just now. 3446 */ 3447 ieee80211_sta_reset_beacon_monitor(sdata); 3448 3449 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 3450 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, 3451 len - baselen, false, &elems, 3452 care_about_ies, ncrc); 3453 3454 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3455 ieee80211_check_tim(elems.tim, elems.tim_len, ifmgd->aid)) { 3456 if (local->hw.conf.dynamic_ps_timeout > 0) { 3457 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3458 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3459 ieee80211_hw_config(local, 3460 IEEE80211_CONF_CHANGE_PS); 3461 } 3462 ieee80211_send_nullfunc(local, sdata, false); 3463 } else if (!local->pspolling && sdata->u.mgd.powersave) { 3464 local->pspolling = true; 3465 3466 /* 3467 * Here is assumed that the driver will be 3468 * able to send ps-poll frame and receive a 3469 * response even though power save mode is 3470 * enabled, but some drivers might require 3471 * to disable power save here. This needs 3472 * to be investigated. 3473 */ 3474 ieee80211_send_pspoll(local, sdata); 3475 } 3476 } 3477 3478 if (sdata->vif.p2p || 3479 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3480 struct ieee80211_p2p_noa_attr noa = {}; 3481 int ret; 3482 3483 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable, 3484 len - baselen, 3485 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3486 (u8 *) &noa, sizeof(noa)); 3487 if (ret >= 2) { 3488 if (sdata->u.mgd.p2p_noa_index != noa.index) { 3489 /* valid noa_attr and index changed */ 3490 sdata->u.mgd.p2p_noa_index = noa.index; 3491 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 3492 changed |= BSS_CHANGED_P2P_PS; 3493 /* 3494 * make sure we update all information, the CRC 3495 * mechanism doesn't look at P2P attributes. 3496 */ 3497 ifmgd->beacon_crc_valid = false; 3498 } 3499 } else if (sdata->u.mgd.p2p_noa_index != -1) { 3500 /* noa_attr not found and we had valid noa_attr before */ 3501 sdata->u.mgd.p2p_noa_index = -1; 3502 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 3503 changed |= BSS_CHANGED_P2P_PS; 3504 ifmgd->beacon_crc_valid = false; 3505 } 3506 } 3507 3508 if (ifmgd->csa_waiting_bcn) 3509 ieee80211_chswitch_post_beacon(sdata); 3510 3511 /* 3512 * Update beacon timing and dtim count on every beacon appearance. This 3513 * will allow the driver to use the most updated values. Do it before 3514 * comparing this one with last received beacon. 3515 * IMPORTANT: These parameters would possibly be out of sync by the time 3516 * the driver will use them. The synchronized view is currently 3517 * guaranteed only in certain callbacks. 3518 */ 3519 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 3520 sdata->vif.bss_conf.sync_tsf = 3521 le64_to_cpu(mgmt->u.beacon.timestamp); 3522 sdata->vif.bss_conf.sync_device_ts = 3523 rx_status->device_timestamp; 3524 if (elems.tim) 3525 sdata->vif.bss_conf.sync_dtim_count = 3526 elems.tim->dtim_count; 3527 else 3528 sdata->vif.bss_conf.sync_dtim_count = 0; 3529 } 3530 3531 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) 3532 return; 3533 ifmgd->beacon_crc = ncrc; 3534 ifmgd->beacon_crc_valid = true; 3535 3536 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); 3537 3538 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, 3539 rx_status->device_timestamp, 3540 &elems, true); 3541 3542 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && 3543 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, 3544 elems.wmm_param_len)) 3545 changed |= BSS_CHANGED_QOS; 3546 3547 /* 3548 * If we haven't had a beacon before, tell the driver about the 3549 * DTIM period (and beacon timing if desired) now. 3550 */ 3551 if (!ifmgd->have_beacon) { 3552 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 3553 if (elems.tim) 3554 bss_conf->dtim_period = elems.tim->dtim_period ?: 1; 3555 else 3556 bss_conf->dtim_period = 1; 3557 3558 changed |= BSS_CHANGED_BEACON_INFO; 3559 ifmgd->have_beacon = true; 3560 3561 mutex_lock(&local->iflist_mtx); 3562 ieee80211_recalc_ps(local); 3563 mutex_unlock(&local->iflist_mtx); 3564 3565 ieee80211_recalc_ps_vif(sdata); 3566 } 3567 3568 if (elems.erp_info) { 3569 erp_valid = true; 3570 erp_value = elems.erp_info[0]; 3571 } else { 3572 erp_valid = false; 3573 } 3574 changed |= ieee80211_handle_bss_capability(sdata, 3575 le16_to_cpu(mgmt->u.beacon.capab_info), 3576 erp_valid, erp_value); 3577 3578 mutex_lock(&local->sta_mtx); 3579 sta = sta_info_get(sdata, bssid); 3580 3581 if (ieee80211_config_bw(sdata, sta, 3582 elems.ht_cap_elem, elems.ht_operation, 3583 elems.vht_operation, bssid, &changed)) { 3584 mutex_unlock(&local->sta_mtx); 3585 sdata_info(sdata, 3586 "failed to follow AP %pM bandwidth change, disconnect\n", 3587 bssid); 3588 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3589 WLAN_REASON_DEAUTH_LEAVING, 3590 true, deauth_buf); 3591 ieee80211_report_disconnect(sdata, deauth_buf, 3592 sizeof(deauth_buf), true, 3593 WLAN_REASON_DEAUTH_LEAVING); 3594 return; 3595 } 3596 3597 if (sta && elems.opmode_notif) 3598 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, 3599 rx_status->band); 3600 mutex_unlock(&local->sta_mtx); 3601 3602 changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, 3603 elems.country_elem, 3604 elems.country_elem_len, 3605 elems.pwr_constr_elem, 3606 elems.cisco_dtpc_elem); 3607 3608 ieee80211_bss_info_change_notify(sdata, changed); 3609 } 3610 3611 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 3612 struct sk_buff *skb) 3613 { 3614 struct ieee80211_rx_status *rx_status; 3615 struct ieee80211_mgmt *mgmt; 3616 u16 fc; 3617 struct ieee802_11_elems elems; 3618 int ies_len; 3619 3620 rx_status = (struct ieee80211_rx_status *) skb->cb; 3621 mgmt = (struct ieee80211_mgmt *) skb->data; 3622 fc = le16_to_cpu(mgmt->frame_control); 3623 3624 sdata_lock(sdata); 3625 3626 switch (fc & IEEE80211_FCTL_STYPE) { 3627 case IEEE80211_STYPE_BEACON: 3628 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); 3629 break; 3630 case IEEE80211_STYPE_PROBE_RESP: 3631 ieee80211_rx_mgmt_probe_resp(sdata, skb); 3632 break; 3633 case IEEE80211_STYPE_AUTH: 3634 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 3635 break; 3636 case IEEE80211_STYPE_DEAUTH: 3637 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 3638 break; 3639 case IEEE80211_STYPE_DISASSOC: 3640 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 3641 break; 3642 case IEEE80211_STYPE_ASSOC_RESP: 3643 case IEEE80211_STYPE_REASSOC_RESP: 3644 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 3645 break; 3646 case IEEE80211_STYPE_ACTION: 3647 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 3648 ies_len = skb->len - 3649 offsetof(struct ieee80211_mgmt, 3650 u.action.u.chan_switch.variable); 3651 3652 if (ies_len < 0) 3653 break; 3654 3655 ieee802_11_parse_elems( 3656 mgmt->u.action.u.chan_switch.variable, 3657 ies_len, true, &elems); 3658 3659 if (elems.parse_error) 3660 break; 3661 3662 ieee80211_sta_process_chanswitch(sdata, 3663 rx_status->mactime, 3664 rx_status->device_timestamp, 3665 &elems, false); 3666 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 3667 ies_len = skb->len - 3668 offsetof(struct ieee80211_mgmt, 3669 u.action.u.ext_chan_switch.variable); 3670 3671 if (ies_len < 0) 3672 break; 3673 3674 ieee802_11_parse_elems( 3675 mgmt->u.action.u.ext_chan_switch.variable, 3676 ies_len, true, &elems); 3677 3678 if (elems.parse_error) 3679 break; 3680 3681 /* for the handling code pretend this was also an IE */ 3682 elems.ext_chansw_ie = 3683 &mgmt->u.action.u.ext_chan_switch.data; 3684 3685 ieee80211_sta_process_chanswitch(sdata, 3686 rx_status->mactime, 3687 rx_status->device_timestamp, 3688 &elems, false); 3689 } 3690 break; 3691 } 3692 sdata_unlock(sdata); 3693 } 3694 3695 static void ieee80211_sta_timer(unsigned long data) 3696 { 3697 struct ieee80211_sub_if_data *sdata = 3698 (struct ieee80211_sub_if_data *) data; 3699 3700 ieee80211_queue_work(&sdata->local->hw, &sdata->work); 3701 } 3702 3703 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 3704 u8 *bssid, u8 reason, bool tx) 3705 { 3706 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3707 3708 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 3709 tx, frame_buf); 3710 3711 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 3712 reason); 3713 } 3714 3715 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 3716 { 3717 struct ieee80211_local *local = sdata->local; 3718 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3719 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 3720 u32 tx_flags = 0; 3721 u16 trans = 1; 3722 u16 status = 0; 3723 3724 sdata_assert_lock(sdata); 3725 3726 if (WARN_ON_ONCE(!auth_data)) 3727 return -EINVAL; 3728 3729 auth_data->tries++; 3730 3731 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 3732 sdata_info(sdata, "authentication with %pM timed out\n", 3733 auth_data->bss->bssid); 3734 3735 /* 3736 * Most likely AP is not in the range so remove the 3737 * bss struct for that AP. 3738 */ 3739 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 3740 3741 return -ETIMEDOUT; 3742 } 3743 3744 drv_mgd_prepare_tx(local, sdata); 3745 3746 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 3747 auth_data->bss->bssid, auth_data->tries, 3748 IEEE80211_AUTH_MAX_TRIES); 3749 3750 auth_data->expected_transaction = 2; 3751 3752 if (auth_data->algorithm == WLAN_AUTH_SAE) { 3753 trans = auth_data->sae_trans; 3754 status = auth_data->sae_status; 3755 auth_data->expected_transaction = trans; 3756 } 3757 3758 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3759 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 3760 IEEE80211_TX_INTFL_MLME_CONN_TX; 3761 3762 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 3763 auth_data->data, auth_data->data_len, 3764 auth_data->bss->bssid, 3765 auth_data->bss->bssid, NULL, 0, 0, 3766 tx_flags); 3767 3768 if (tx_flags == 0) { 3769 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 3770 auth_data->timeout_started = true; 3771 run_again(sdata, auth_data->timeout); 3772 } else { 3773 auth_data->timeout = 3774 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 3775 auth_data->timeout_started = true; 3776 run_again(sdata, auth_data->timeout); 3777 } 3778 3779 return 0; 3780 } 3781 3782 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 3783 { 3784 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3785 struct ieee80211_local *local = sdata->local; 3786 3787 sdata_assert_lock(sdata); 3788 3789 assoc_data->tries++; 3790 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 3791 sdata_info(sdata, "association with %pM timed out\n", 3792 assoc_data->bss->bssid); 3793 3794 /* 3795 * Most likely AP is not in the range so remove the 3796 * bss struct for that AP. 3797 */ 3798 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss); 3799 3800 return -ETIMEDOUT; 3801 } 3802 3803 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 3804 assoc_data->bss->bssid, assoc_data->tries, 3805 IEEE80211_ASSOC_MAX_TRIES); 3806 ieee80211_send_assoc(sdata); 3807 3808 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 3809 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 3810 assoc_data->timeout_started = true; 3811 run_again(sdata, assoc_data->timeout); 3812 } else { 3813 assoc_data->timeout = 3814 round_jiffies_up(jiffies + 3815 IEEE80211_ASSOC_TIMEOUT_LONG); 3816 assoc_data->timeout_started = true; 3817 run_again(sdata, assoc_data->timeout); 3818 } 3819 3820 return 0; 3821 } 3822 3823 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 3824 __le16 fc, bool acked) 3825 { 3826 struct ieee80211_local *local = sdata->local; 3827 3828 sdata->u.mgd.status_fc = fc; 3829 sdata->u.mgd.status_acked = acked; 3830 sdata->u.mgd.status_received = true; 3831 3832 ieee80211_queue_work(&local->hw, &sdata->work); 3833 } 3834 3835 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 3836 { 3837 struct ieee80211_local *local = sdata->local; 3838 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3839 3840 sdata_lock(sdata); 3841 3842 if (ifmgd->status_received) { 3843 __le16 fc = ifmgd->status_fc; 3844 bool status_acked = ifmgd->status_acked; 3845 3846 ifmgd->status_received = false; 3847 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 3848 if (status_acked) { 3849 ifmgd->auth_data->timeout = 3850 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT; 3851 run_again(sdata, ifmgd->auth_data->timeout); 3852 } else { 3853 ifmgd->auth_data->timeout = jiffies - 1; 3854 } 3855 ifmgd->auth_data->timeout_started = true; 3856 } else if (ifmgd->assoc_data && 3857 (ieee80211_is_assoc_req(fc) || 3858 ieee80211_is_reassoc_req(fc))) { 3859 if (status_acked) { 3860 ifmgd->assoc_data->timeout = 3861 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 3862 run_again(sdata, ifmgd->assoc_data->timeout); 3863 } else { 3864 ifmgd->assoc_data->timeout = jiffies - 1; 3865 } 3866 ifmgd->assoc_data->timeout_started = true; 3867 } 3868 } 3869 3870 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 3871 time_after(jiffies, ifmgd->auth_data->timeout)) { 3872 if (ifmgd->auth_data->done) { 3873 /* 3874 * ok ... we waited for assoc but userspace didn't, 3875 * so let's just kill the auth data 3876 */ 3877 ieee80211_destroy_auth_data(sdata, false); 3878 } else if (ieee80211_auth(sdata)) { 3879 u8 bssid[ETH_ALEN]; 3880 struct ieee80211_event event = { 3881 .type = MLME_EVENT, 3882 .u.mlme.data = AUTH_EVENT, 3883 .u.mlme.status = MLME_TIMEOUT, 3884 }; 3885 3886 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN); 3887 3888 ieee80211_destroy_auth_data(sdata, false); 3889 3890 cfg80211_auth_timeout(sdata->dev, bssid); 3891 drv_event_callback(sdata->local, sdata, &event); 3892 } 3893 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 3894 run_again(sdata, ifmgd->auth_data->timeout); 3895 3896 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 3897 time_after(jiffies, ifmgd->assoc_data->timeout)) { 3898 if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) || 3899 ieee80211_do_assoc(sdata)) { 3900 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 3901 struct ieee80211_event event = { 3902 .type = MLME_EVENT, 3903 .u.mlme.data = ASSOC_EVENT, 3904 .u.mlme.status = MLME_TIMEOUT, 3905 }; 3906 3907 ieee80211_destroy_assoc_data(sdata, false, false); 3908 cfg80211_assoc_timeout(sdata->dev, bss); 3909 drv_event_callback(sdata->local, sdata, &event); 3910 } 3911 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 3912 run_again(sdata, ifmgd->assoc_data->timeout); 3913 3914 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 3915 ifmgd->associated) { 3916 u8 bssid[ETH_ALEN]; 3917 int max_tries; 3918 3919 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 3920 3921 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3922 max_tries = max_nullfunc_tries; 3923 else 3924 max_tries = max_probe_tries; 3925 3926 /* ACK received for nullfunc probing frame */ 3927 if (!ifmgd->probe_send_count) 3928 ieee80211_reset_ap_probe(sdata); 3929 else if (ifmgd->nullfunc_failed) { 3930 if (ifmgd->probe_send_count < max_tries) { 3931 mlme_dbg(sdata, 3932 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 3933 bssid, ifmgd->probe_send_count, 3934 max_tries); 3935 ieee80211_mgd_probe_ap_send(sdata); 3936 } else { 3937 mlme_dbg(sdata, 3938 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 3939 bssid); 3940 ieee80211_sta_connection_lost(sdata, bssid, 3941 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3942 false); 3943 } 3944 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 3945 run_again(sdata, ifmgd->probe_timeout); 3946 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 3947 mlme_dbg(sdata, 3948 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 3949 bssid, probe_wait_ms); 3950 ieee80211_sta_connection_lost(sdata, bssid, 3951 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 3952 } else if (ifmgd->probe_send_count < max_tries) { 3953 mlme_dbg(sdata, 3954 "No probe response from AP %pM after %dms, try %d/%i\n", 3955 bssid, probe_wait_ms, 3956 ifmgd->probe_send_count, max_tries); 3957 ieee80211_mgd_probe_ap_send(sdata); 3958 } else { 3959 /* 3960 * We actually lost the connection ... or did we? 3961 * Let's make sure! 3962 */ 3963 mlme_dbg(sdata, 3964 "No probe response from AP %pM after %dms, disconnecting.\n", 3965 bssid, probe_wait_ms); 3966 3967 ieee80211_sta_connection_lost(sdata, bssid, 3968 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 3969 } 3970 } 3971 3972 sdata_unlock(sdata); 3973 } 3974 3975 static void ieee80211_sta_bcn_mon_timer(unsigned long data) 3976 { 3977 struct ieee80211_sub_if_data *sdata = 3978 (struct ieee80211_sub_if_data *) data; 3979 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3980 3981 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 3982 return; 3983 3984 sdata->u.mgd.connection_loss = false; 3985 ieee80211_queue_work(&sdata->local->hw, 3986 &sdata->u.mgd.beacon_connection_loss_work); 3987 } 3988 3989 static void ieee80211_sta_conn_mon_timer(unsigned long data) 3990 { 3991 struct ieee80211_sub_if_data *sdata = 3992 (struct ieee80211_sub_if_data *) data; 3993 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3994 struct ieee80211_local *local = sdata->local; 3995 3996 if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) 3997 return; 3998 3999 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); 4000 } 4001 4002 static void ieee80211_sta_monitor_work(struct work_struct *work) 4003 { 4004 struct ieee80211_sub_if_data *sdata = 4005 container_of(work, struct ieee80211_sub_if_data, 4006 u.mgd.monitor_work); 4007 4008 ieee80211_mgd_probe_ap(sdata, false); 4009 } 4010 4011 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 4012 { 4013 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 4014 __ieee80211_stop_poll(sdata); 4015 4016 /* let's probe the connection once */ 4017 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4018 ieee80211_queue_work(&sdata->local->hw, 4019 &sdata->u.mgd.monitor_work); 4020 } 4021 } 4022 4023 #ifdef CONFIG_PM 4024 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 4025 { 4026 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4027 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4028 4029 sdata_lock(sdata); 4030 4031 if (ifmgd->auth_data || ifmgd->assoc_data) { 4032 const u8 *bssid = ifmgd->auth_data ? 4033 ifmgd->auth_data->bss->bssid : 4034 ifmgd->assoc_data->bss->bssid; 4035 4036 /* 4037 * If we are trying to authenticate / associate while suspending, 4038 * cfg80211 won't know and won't actually abort those attempts, 4039 * thus we need to do that ourselves. 4040 */ 4041 ieee80211_send_deauth_disassoc(sdata, bssid, 4042 IEEE80211_STYPE_DEAUTH, 4043 WLAN_REASON_DEAUTH_LEAVING, 4044 false, frame_buf); 4045 if (ifmgd->assoc_data) 4046 ieee80211_destroy_assoc_data(sdata, false, true); 4047 if (ifmgd->auth_data) 4048 ieee80211_destroy_auth_data(sdata, false); 4049 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 4050 IEEE80211_DEAUTH_FRAME_LEN); 4051 } 4052 4053 /* This is a bit of a hack - we should find a better and more generic 4054 * solution to this. Normally when suspending, cfg80211 will in fact 4055 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 4056 * auth (not so important) or assoc (this is the problem) process. 4057 * 4058 * As a consequence, it can happen that we are in the process of both 4059 * associating and suspending, and receive an association response 4060 * after cfg80211 has checked if it needs to disconnect, but before 4061 * we actually set the flag to drop incoming frames. This will then 4062 * cause the workqueue flush to process the association response in 4063 * the suspend, resulting in a successful association just before it 4064 * tries to remove the interface from the driver, which now though 4065 * has a channel context assigned ... this results in issues. 4066 * 4067 * To work around this (for now) simply deauth here again if we're 4068 * now connected. 4069 */ 4070 if (ifmgd->associated && !sdata->local->wowlan) { 4071 u8 bssid[ETH_ALEN]; 4072 struct cfg80211_deauth_request req = { 4073 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 4074 .bssid = bssid, 4075 }; 4076 4077 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN); 4078 ieee80211_mgd_deauth(sdata, &req); 4079 } 4080 4081 sdata_unlock(sdata); 4082 } 4083 4084 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 4085 { 4086 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4087 4088 sdata_lock(sdata); 4089 if (!ifmgd->associated) { 4090 sdata_unlock(sdata); 4091 return; 4092 } 4093 4094 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 4095 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 4096 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 4097 ieee80211_sta_connection_lost(sdata, 4098 ifmgd->associated->bssid, 4099 WLAN_REASON_UNSPECIFIED, 4100 true); 4101 sdata_unlock(sdata); 4102 return; 4103 } 4104 sdata_unlock(sdata); 4105 } 4106 #endif 4107 4108 /* interface setup */ 4109 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 4110 { 4111 struct ieee80211_if_managed *ifmgd; 4112 4113 ifmgd = &sdata->u.mgd; 4114 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 4115 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); 4116 INIT_WORK(&ifmgd->beacon_connection_loss_work, 4117 ieee80211_beacon_connection_loss_work); 4118 INIT_WORK(&ifmgd->csa_connection_drop_work, 4119 ieee80211_csa_connection_drop_work); 4120 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work); 4121 INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work, 4122 ieee80211_tdls_peer_del_work); 4123 setup_timer(&ifmgd->timer, ieee80211_sta_timer, 4124 (unsigned long) sdata); 4125 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 4126 (unsigned long) sdata); 4127 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 4128 (unsigned long) sdata); 4129 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, 4130 (unsigned long) sdata); 4131 INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk, 4132 ieee80211_sta_handle_tspec_ac_params_wk); 4133 4134 ifmgd->flags = 0; 4135 ifmgd->powersave = sdata->wdev.ps; 4136 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 4137 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 4138 ifmgd->p2p_noa_index = -1; 4139 4140 if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 4141 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC; 4142 else 4143 ifmgd->req_smps = IEEE80211_SMPS_OFF; 4144 4145 /* Setup TDLS data */ 4146 spin_lock_init(&ifmgd->teardown_lock); 4147 ifmgd->teardown_skb = NULL; 4148 ifmgd->orig_teardown_skb = NULL; 4149 } 4150 4151 /* scan finished notification */ 4152 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 4153 { 4154 struct ieee80211_sub_if_data *sdata; 4155 4156 /* Restart STA timers */ 4157 rcu_read_lock(); 4158 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 4159 if (ieee80211_sdata_running(sdata)) 4160 ieee80211_restart_sta_timer(sdata); 4161 } 4162 rcu_read_unlock(); 4163 } 4164 4165 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, 4166 struct cfg80211_bss *cbss) 4167 { 4168 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4169 const u8 *ht_cap_ie, *vht_cap_ie; 4170 const struct ieee80211_ht_cap *ht_cap; 4171 const struct ieee80211_vht_cap *vht_cap; 4172 u8 chains = 1; 4173 4174 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT) 4175 return chains; 4176 4177 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4178 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) { 4179 ht_cap = (void *)(ht_cap_ie + 2); 4180 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4181 /* 4182 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4183 * "Tx Unequal Modulation Supported" fields. 4184 */ 4185 } 4186 4187 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) 4188 return chains; 4189 4190 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4191 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) { 4192 u8 nss; 4193 u16 tx_mcs_map; 4194 4195 vht_cap = (void *)(vht_cap_ie + 2); 4196 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4197 for (nss = 8; nss > 0; nss--) { 4198 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4199 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4200 break; 4201 } 4202 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4203 chains = max(chains, nss); 4204 } 4205 4206 return chains; 4207 } 4208 4209 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4210 struct cfg80211_bss *cbss) 4211 { 4212 struct ieee80211_local *local = sdata->local; 4213 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4214 const struct ieee80211_ht_cap *ht_cap = NULL; 4215 const struct ieee80211_ht_operation *ht_oper = NULL; 4216 const struct ieee80211_vht_operation *vht_oper = NULL; 4217 struct ieee80211_supported_band *sband; 4218 struct cfg80211_chan_def chandef; 4219 int ret; 4220 u32 i; 4221 bool have_80mhz; 4222 4223 sband = local->hw.wiphy->bands[cbss->channel->band]; 4224 4225 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ | 4226 IEEE80211_STA_DISABLE_80P80MHZ | 4227 IEEE80211_STA_DISABLE_160MHZ); 4228 4229 rcu_read_lock(); 4230 4231 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && 4232 sband->ht_cap.ht_supported) { 4233 const u8 *ht_oper_ie, *ht_cap_ie; 4234 4235 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); 4236 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper)) 4237 ht_oper = (void *)(ht_oper_ie + 2); 4238 4239 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY); 4240 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) 4241 ht_cap = (void *)(ht_cap_ie + 2); 4242 4243 if (!ht_cap) { 4244 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4245 ht_oper = NULL; 4246 } 4247 } 4248 4249 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 4250 sband->vht_cap.vht_supported) { 4251 const u8 *vht_oper_ie, *vht_cap; 4252 4253 vht_oper_ie = ieee80211_bss_get_ie(cbss, 4254 WLAN_EID_VHT_OPERATION); 4255 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper)) 4256 vht_oper = (void *)(vht_oper_ie + 2); 4257 if (vht_oper && !ht_oper) { 4258 vht_oper = NULL; 4259 sdata_info(sdata, 4260 "AP advertised VHT without HT, disabling both\n"); 4261 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4262 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4263 } 4264 4265 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); 4266 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) { 4267 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4268 vht_oper = NULL; 4269 } 4270 } 4271 4272 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4273 have_80mhz = false; 4274 for (i = 0; i < sband->n_channels; i++) { 4275 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4276 IEEE80211_CHAN_NO_80MHZ)) 4277 continue; 4278 4279 have_80mhz = true; 4280 break; 4281 } 4282 4283 if (!have_80mhz) 4284 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4285 4286 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband, 4287 cbss->channel, 4288 ht_cap, ht_oper, vht_oper, 4289 &chandef, false); 4290 4291 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss), 4292 local->rx_chains); 4293 4294 rcu_read_unlock(); 4295 4296 /* will change later if needed */ 4297 sdata->smps_mode = IEEE80211_SMPS_OFF; 4298 4299 mutex_lock(&local->mtx); 4300 /* 4301 * If this fails (possibly due to channel context sharing 4302 * on incompatible channels, e.g. 80+80 and 160 sharing the 4303 * same control channel) try to use a smaller bandwidth. 4304 */ 4305 ret = ieee80211_vif_use_channel(sdata, &chandef, 4306 IEEE80211_CHANCTX_SHARED); 4307 4308 /* don't downgrade for 5 and 10 MHz channels, though. */ 4309 if (chandef.width == NL80211_CHAN_WIDTH_5 || 4310 chandef.width == NL80211_CHAN_WIDTH_10) 4311 goto out; 4312 4313 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { 4314 ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); 4315 ret = ieee80211_vif_use_channel(sdata, &chandef, 4316 IEEE80211_CHANCTX_SHARED); 4317 } 4318 out: 4319 mutex_unlock(&local->mtx); 4320 return ret; 4321 } 4322 4323 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 4324 struct cfg80211_bss *cbss, bool assoc, 4325 bool override) 4326 { 4327 struct ieee80211_local *local = sdata->local; 4328 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4329 struct ieee80211_bss *bss = (void *)cbss->priv; 4330 struct sta_info *new_sta = NULL; 4331 struct ieee80211_supported_band *sband; 4332 bool have_sta = false; 4333 int err; 4334 4335 sband = local->hw.wiphy->bands[cbss->channel->band]; 4336 4337 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) 4338 return -EINVAL; 4339 4340 if (assoc) { 4341 rcu_read_lock(); 4342 have_sta = sta_info_get(sdata, cbss->bssid); 4343 rcu_read_unlock(); 4344 } 4345 4346 if (!have_sta) { 4347 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL); 4348 if (!new_sta) 4349 return -ENOMEM; 4350 } 4351 4352 if (new_sta || override) { 4353 err = ieee80211_prep_channel(sdata, cbss); 4354 if (err) { 4355 if (new_sta) 4356 sta_info_free(local, new_sta); 4357 return -EINVAL; 4358 } 4359 } 4360 4361 if (new_sta) { 4362 u32 rates = 0, basic_rates = 0; 4363 bool have_higher_than_11mbit; 4364 int min_rate = INT_MAX, min_rate_index = -1; 4365 struct ieee80211_chanctx_conf *chanctx_conf; 4366 const struct cfg80211_bss_ies *ies; 4367 int shift = ieee80211_vif_get_shift(&sdata->vif); 4368 u32 rate_flags; 4369 4370 rcu_read_lock(); 4371 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 4372 if (WARN_ON(!chanctx_conf)) { 4373 rcu_read_unlock(); 4374 sta_info_free(local, new_sta); 4375 return -EINVAL; 4376 } 4377 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def); 4378 rcu_read_unlock(); 4379 4380 ieee80211_get_rates(sband, bss->supp_rates, 4381 bss->supp_rates_len, 4382 &rates, &basic_rates, 4383 &have_higher_than_11mbit, 4384 &min_rate, &min_rate_index, 4385 shift, rate_flags); 4386 4387 /* 4388 * This used to be a workaround for basic rates missing 4389 * in the association response frame. Now that we no 4390 * longer use the basic rates from there, it probably 4391 * doesn't happen any more, but keep the workaround so 4392 * in case some *other* APs are buggy in different ways 4393 * we can connect -- with a warning. 4394 */ 4395 if (!basic_rates && min_rate_index >= 0) { 4396 sdata_info(sdata, 4397 "No basic rates, using min rate instead\n"); 4398 basic_rates = BIT(min_rate_index); 4399 } 4400 4401 new_sta->sta.supp_rates[cbss->channel->band] = rates; 4402 sdata->vif.bss_conf.basic_rates = basic_rates; 4403 4404 /* cf. IEEE 802.11 9.2.12 */ 4405 if (cbss->channel->band == NL80211_BAND_2GHZ && 4406 have_higher_than_11mbit) 4407 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; 4408 else 4409 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; 4410 4411 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN); 4412 4413 /* set timing information */ 4414 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval; 4415 rcu_read_lock(); 4416 ies = rcu_dereference(cbss->beacon_ies); 4417 if (ies) { 4418 const u8 *tim_ie; 4419 4420 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4421 sdata->vif.bss_conf.sync_device_ts = 4422 bss->device_ts_beacon; 4423 tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 4424 ies->data, ies->len); 4425 if (tim_ie && tim_ie[1] >= 2) 4426 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2]; 4427 else 4428 sdata->vif.bss_conf.sync_dtim_count = 0; 4429 } else if (!ieee80211_hw_check(&sdata->local->hw, 4430 TIMING_BEACON_ONLY)) { 4431 ies = rcu_dereference(cbss->proberesp_ies); 4432 /* must be non-NULL since beacon IEs were NULL */ 4433 sdata->vif.bss_conf.sync_tsf = ies->tsf; 4434 sdata->vif.bss_conf.sync_device_ts = 4435 bss->device_ts_presp; 4436 sdata->vif.bss_conf.sync_dtim_count = 0; 4437 } else { 4438 sdata->vif.bss_conf.sync_tsf = 0; 4439 sdata->vif.bss_conf.sync_device_ts = 0; 4440 sdata->vif.bss_conf.sync_dtim_count = 0; 4441 } 4442 rcu_read_unlock(); 4443 4444 /* tell driver about BSSID, basic rates and timing */ 4445 ieee80211_bss_info_change_notify(sdata, 4446 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES | 4447 BSS_CHANGED_BEACON_INT); 4448 4449 if (assoc) 4450 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 4451 4452 err = sta_info_insert(new_sta); 4453 new_sta = NULL; 4454 if (err) { 4455 sdata_info(sdata, 4456 "failed to insert STA entry for the AP (error %d)\n", 4457 err); 4458 return err; 4459 } 4460 } else 4461 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid)); 4462 4463 /* Cancel scan to ensure that nothing interferes with connection */ 4464 if (local->scanning) 4465 ieee80211_scan_cancel(local); 4466 4467 return 0; 4468 } 4469 4470 /* config hooks */ 4471 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 4472 struct cfg80211_auth_request *req) 4473 { 4474 struct ieee80211_local *local = sdata->local; 4475 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4476 struct ieee80211_mgd_auth_data *auth_data; 4477 u16 auth_alg; 4478 int err; 4479 4480 /* prepare auth data structure */ 4481 4482 switch (req->auth_type) { 4483 case NL80211_AUTHTYPE_OPEN_SYSTEM: 4484 auth_alg = WLAN_AUTH_OPEN; 4485 break; 4486 case NL80211_AUTHTYPE_SHARED_KEY: 4487 if (IS_ERR(local->wep_tx_tfm)) 4488 return -EOPNOTSUPP; 4489 auth_alg = WLAN_AUTH_SHARED_KEY; 4490 break; 4491 case NL80211_AUTHTYPE_FT: 4492 auth_alg = WLAN_AUTH_FT; 4493 break; 4494 case NL80211_AUTHTYPE_NETWORK_EAP: 4495 auth_alg = WLAN_AUTH_LEAP; 4496 break; 4497 case NL80211_AUTHTYPE_SAE: 4498 auth_alg = WLAN_AUTH_SAE; 4499 break; 4500 case NL80211_AUTHTYPE_FILS_SK: 4501 auth_alg = WLAN_AUTH_FILS_SK; 4502 break; 4503 case NL80211_AUTHTYPE_FILS_SK_PFS: 4504 auth_alg = WLAN_AUTH_FILS_SK_PFS; 4505 break; 4506 case NL80211_AUTHTYPE_FILS_PK: 4507 auth_alg = WLAN_AUTH_FILS_PK; 4508 break; 4509 default: 4510 return -EOPNOTSUPP; 4511 } 4512 4513 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 4514 req->ie_len, GFP_KERNEL); 4515 if (!auth_data) 4516 return -ENOMEM; 4517 4518 auth_data->bss = req->bss; 4519 4520 if (req->auth_data_len >= 4) { 4521 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 4522 __le16 *pos = (__le16 *) req->auth_data; 4523 4524 auth_data->sae_trans = le16_to_cpu(pos[0]); 4525 auth_data->sae_status = le16_to_cpu(pos[1]); 4526 } 4527 memcpy(auth_data->data, req->auth_data + 4, 4528 req->auth_data_len - 4); 4529 auth_data->data_len += req->auth_data_len - 4; 4530 } 4531 4532 if (req->ie && req->ie_len) { 4533 memcpy(&auth_data->data[auth_data->data_len], 4534 req->ie, req->ie_len); 4535 auth_data->data_len += req->ie_len; 4536 } 4537 4538 if (req->key && req->key_len) { 4539 auth_data->key_len = req->key_len; 4540 auth_data->key_idx = req->key_idx; 4541 memcpy(auth_data->key, req->key, req->key_len); 4542 } 4543 4544 auth_data->algorithm = auth_alg; 4545 4546 /* try to authenticate/probe */ 4547 4548 if ((ifmgd->auth_data && !ifmgd->auth_data->done) || 4549 ifmgd->assoc_data) { 4550 err = -EBUSY; 4551 goto err_free; 4552 } 4553 4554 if (ifmgd->auth_data) 4555 ieee80211_destroy_auth_data(sdata, false); 4556 4557 /* prep auth_data so we don't go into idle on disassoc */ 4558 ifmgd->auth_data = auth_data; 4559 4560 if (ifmgd->associated) { 4561 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4562 4563 sdata_info(sdata, 4564 "disconnect from AP %pM for new auth to %pM\n", 4565 ifmgd->associated->bssid, req->bss->bssid); 4566 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4567 WLAN_REASON_UNSPECIFIED, 4568 false, frame_buf); 4569 4570 ieee80211_report_disconnect(sdata, frame_buf, 4571 sizeof(frame_buf), true, 4572 WLAN_REASON_UNSPECIFIED); 4573 } 4574 4575 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid); 4576 4577 err = ieee80211_prep_connection(sdata, req->bss, false, false); 4578 if (err) 4579 goto err_clear; 4580 4581 err = ieee80211_auth(sdata); 4582 if (err) { 4583 sta_info_destroy_addr(sdata, req->bss->bssid); 4584 goto err_clear; 4585 } 4586 4587 /* hold our own reference */ 4588 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 4589 return 0; 4590 4591 err_clear: 4592 eth_zero_addr(ifmgd->bssid); 4593 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 4594 ifmgd->auth_data = NULL; 4595 mutex_lock(&sdata->local->mtx); 4596 ieee80211_vif_release_channel(sdata); 4597 mutex_unlock(&sdata->local->mtx); 4598 err_free: 4599 kfree(auth_data); 4600 return err; 4601 } 4602 4603 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 4604 struct cfg80211_assoc_request *req) 4605 { 4606 struct ieee80211_local *local = sdata->local; 4607 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4608 struct ieee80211_bss *bss = (void *)req->bss->priv; 4609 struct ieee80211_mgd_assoc_data *assoc_data; 4610 const struct cfg80211_bss_ies *beacon_ies; 4611 struct ieee80211_supported_band *sband; 4612 const u8 *ssidie, *ht_ie, *vht_ie; 4613 int i, err; 4614 bool override = false; 4615 4616 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL); 4617 if (!assoc_data) 4618 return -ENOMEM; 4619 4620 rcu_read_lock(); 4621 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID); 4622 if (!ssidie) { 4623 rcu_read_unlock(); 4624 kfree(assoc_data); 4625 return -EINVAL; 4626 } 4627 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]); 4628 assoc_data->ssid_len = ssidie[1]; 4629 rcu_read_unlock(); 4630 4631 if (ifmgd->associated) { 4632 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4633 4634 sdata_info(sdata, 4635 "disconnect from AP %pM for new assoc to %pM\n", 4636 ifmgd->associated->bssid, req->bss->bssid); 4637 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4638 WLAN_REASON_UNSPECIFIED, 4639 false, frame_buf); 4640 4641 ieee80211_report_disconnect(sdata, frame_buf, 4642 sizeof(frame_buf), true, 4643 WLAN_REASON_UNSPECIFIED); 4644 } 4645 4646 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 4647 err = -EBUSY; 4648 goto err_free; 4649 } 4650 4651 if (ifmgd->assoc_data) { 4652 err = -EBUSY; 4653 goto err_free; 4654 } 4655 4656 if (ifmgd->auth_data) { 4657 bool match; 4658 4659 /* keep sta info, bssid if matching */ 4660 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid); 4661 ieee80211_destroy_auth_data(sdata, match); 4662 } 4663 4664 /* prepare assoc data */ 4665 4666 ifmgd->beacon_crc_valid = false; 4667 4668 assoc_data->wmm = bss->wmm_used && 4669 (local->hw.queues >= IEEE80211_NUM_ACS); 4670 4671 /* 4672 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode. 4673 * We still associate in non-HT mode (11a/b/g) if any one of these 4674 * ciphers is configured as pairwise. 4675 * We can set this to true for non-11n hardware, that'll be checked 4676 * separately along with the peer capabilities. 4677 */ 4678 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 4679 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 4680 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 4681 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 4682 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4683 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4684 netdev_info(sdata->dev, 4685 "disabling HT/VHT due to WEP/TKIP use\n"); 4686 } 4687 } 4688 4689 /* Also disable HT if we don't support it or the AP doesn't use WMM */ 4690 sband = local->hw.wiphy->bands[req->bss->channel->band]; 4691 if (!sband->ht_cap.ht_supported || 4692 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 4693 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 4694 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4695 if (!bss->wmm_used && 4696 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 4697 netdev_info(sdata->dev, 4698 "disabling HT as WMM/QoS is not supported by the AP\n"); 4699 } 4700 4701 /* disable VHT if we don't support it or the AP doesn't use WMM */ 4702 if (!sband->vht_cap.vht_supported || 4703 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || 4704 ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { 4705 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4706 if (!bss->wmm_used && 4707 !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) 4708 netdev_info(sdata->dev, 4709 "disabling VHT as WMM/QoS is not supported by the AP\n"); 4710 } 4711 4712 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 4713 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 4714 sizeof(ifmgd->ht_capa_mask)); 4715 4716 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 4717 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 4718 sizeof(ifmgd->vht_capa_mask)); 4719 4720 if (req->ie && req->ie_len) { 4721 memcpy(assoc_data->ie, req->ie, req->ie_len); 4722 assoc_data->ie_len = req->ie_len; 4723 } 4724 4725 if (req->fils_kek) { 4726 /* should already be checked in cfg80211 - so warn */ 4727 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 4728 err = -EINVAL; 4729 goto err_free; 4730 } 4731 memcpy(assoc_data->fils_kek, req->fils_kek, 4732 req->fils_kek_len); 4733 assoc_data->fils_kek_len = req->fils_kek_len; 4734 } 4735 4736 if (req->fils_nonces) 4737 memcpy(assoc_data->fils_nonces, req->fils_nonces, 4738 2 * FILS_NONCE_LEN); 4739 4740 assoc_data->bss = req->bss; 4741 4742 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) { 4743 if (ifmgd->powersave) 4744 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; 4745 else 4746 sdata->smps_mode = IEEE80211_SMPS_OFF; 4747 } else 4748 sdata->smps_mode = ifmgd->req_smps; 4749 4750 assoc_data->capability = req->bss->capability; 4751 assoc_data->supp_rates = bss->supp_rates; 4752 assoc_data->supp_rates_len = bss->supp_rates_len; 4753 4754 rcu_read_lock(); 4755 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION); 4756 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation)) 4757 assoc_data->ap_ht_param = 4758 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param; 4759 else 4760 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4761 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY); 4762 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap)) 4763 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2, 4764 sizeof(struct ieee80211_vht_cap)); 4765 else 4766 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4767 rcu_read_unlock(); 4768 4769 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 4770 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 4771 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 4772 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 4773 4774 if (bss->wmm_used && bss->uapsd_supported && 4775 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 4776 assoc_data->uapsd = true; 4777 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 4778 } else { 4779 assoc_data->uapsd = false; 4780 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 4781 } 4782 4783 if (req->prev_bssid) 4784 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN); 4785 4786 if (req->use_mfp) { 4787 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 4788 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 4789 } else { 4790 ifmgd->mfp = IEEE80211_MFP_DISABLED; 4791 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 4792 } 4793 4794 if (req->flags & ASSOC_REQ_USE_RRM) 4795 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 4796 else 4797 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 4798 4799 if (req->crypto.control_port) 4800 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 4801 else 4802 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 4803 4804 sdata->control_port_protocol = req->crypto.control_port_ethertype; 4805 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 4806 sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, 4807 sdata->vif.type); 4808 4809 /* kick off associate process */ 4810 4811 ifmgd->assoc_data = assoc_data; 4812 ifmgd->dtim_period = 0; 4813 ifmgd->have_beacon = false; 4814 4815 /* override HT/VHT configuration only if the AP and we support it */ 4816 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { 4817 struct ieee80211_sta_ht_cap sta_ht_cap; 4818 4819 if (req->flags & ASSOC_REQ_DISABLE_HT) 4820 override = true; 4821 4822 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 4823 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 4824 4825 /* check for 40 MHz disable override */ 4826 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ) && 4827 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 4828 !(sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) 4829 override = true; 4830 4831 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && 4832 req->flags & ASSOC_REQ_DISABLE_VHT) 4833 override = true; 4834 } 4835 4836 if (req->flags & ASSOC_REQ_DISABLE_HT) { 4837 ifmgd->flags |= IEEE80211_STA_DISABLE_HT; 4838 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4839 } 4840 4841 if (req->flags & ASSOC_REQ_DISABLE_VHT) 4842 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; 4843 4844 err = ieee80211_prep_connection(sdata, req->bss, true, override); 4845 if (err) 4846 goto err_clear; 4847 4848 rcu_read_lock(); 4849 beacon_ies = rcu_dereference(req->bss->beacon_ies); 4850 4851 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC) && 4852 !beacon_ies) { 4853 /* 4854 * Wait up to one beacon interval ... 4855 * should this be more if we miss one? 4856 */ 4857 sdata_info(sdata, "waiting for beacon from %pM\n", 4858 ifmgd->bssid); 4859 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 4860 assoc_data->timeout_started = true; 4861 assoc_data->need_beacon = true; 4862 } else if (beacon_ies) { 4863 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, 4864 beacon_ies->data, 4865 beacon_ies->len); 4866 u8 dtim_count = 0; 4867 4868 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) { 4869 const struct ieee80211_tim_ie *tim; 4870 tim = (void *)(tim_ie + 2); 4871 ifmgd->dtim_period = tim->dtim_period; 4872 dtim_count = tim->dtim_count; 4873 } 4874 ifmgd->have_beacon = true; 4875 assoc_data->timeout = jiffies; 4876 assoc_data->timeout_started = true; 4877 4878 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 4879 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf; 4880 sdata->vif.bss_conf.sync_device_ts = 4881 bss->device_ts_beacon; 4882 sdata->vif.bss_conf.sync_dtim_count = dtim_count; 4883 } 4884 } else { 4885 assoc_data->timeout = jiffies; 4886 assoc_data->timeout_started = true; 4887 } 4888 rcu_read_unlock(); 4889 4890 run_again(sdata, assoc_data->timeout); 4891 4892 if (bss->corrupt_data) { 4893 char *corrupt_type = "data"; 4894 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 4895 if (bss->corrupt_data & 4896 IEEE80211_BSS_CORRUPT_PROBE_RESP) 4897 corrupt_type = "beacon and probe response"; 4898 else 4899 corrupt_type = "beacon"; 4900 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 4901 corrupt_type = "probe response"; 4902 sdata_info(sdata, "associating with AP with corrupt %s\n", 4903 corrupt_type); 4904 } 4905 4906 return 0; 4907 err_clear: 4908 eth_zero_addr(ifmgd->bssid); 4909 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); 4910 ifmgd->assoc_data = NULL; 4911 err_free: 4912 kfree(assoc_data); 4913 return err; 4914 } 4915 4916 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 4917 struct cfg80211_deauth_request *req) 4918 { 4919 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4920 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4921 bool tx = !req->local_state_change; 4922 4923 if (ifmgd->auth_data && 4924 ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) { 4925 sdata_info(sdata, 4926 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 4927 req->bssid, req->reason_code, 4928 ieee80211_get_reason_code_string(req->reason_code)); 4929 4930 drv_mgd_prepare_tx(sdata->local, sdata); 4931 ieee80211_send_deauth_disassoc(sdata, req->bssid, 4932 IEEE80211_STYPE_DEAUTH, 4933 req->reason_code, tx, 4934 frame_buf); 4935 ieee80211_destroy_auth_data(sdata, false); 4936 ieee80211_report_disconnect(sdata, frame_buf, 4937 sizeof(frame_buf), true, 4938 req->reason_code); 4939 4940 return 0; 4941 } 4942 4943 if (ifmgd->assoc_data && 4944 ether_addr_equal(ifmgd->assoc_data->bss->bssid, req->bssid)) { 4945 sdata_info(sdata, 4946 "aborting association with %pM by local choice (Reason: %u=%s)\n", 4947 req->bssid, req->reason_code, 4948 ieee80211_get_reason_code_string(req->reason_code)); 4949 4950 drv_mgd_prepare_tx(sdata->local, sdata); 4951 ieee80211_send_deauth_disassoc(sdata, req->bssid, 4952 IEEE80211_STYPE_DEAUTH, 4953 req->reason_code, tx, 4954 frame_buf); 4955 ieee80211_destroy_assoc_data(sdata, false, true); 4956 ieee80211_report_disconnect(sdata, frame_buf, 4957 sizeof(frame_buf), true, 4958 req->reason_code); 4959 return 0; 4960 } 4961 4962 if (ifmgd->associated && 4963 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) { 4964 sdata_info(sdata, 4965 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 4966 req->bssid, req->reason_code, 4967 ieee80211_get_reason_code_string(req->reason_code)); 4968 4969 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4970 req->reason_code, tx, frame_buf); 4971 ieee80211_report_disconnect(sdata, frame_buf, 4972 sizeof(frame_buf), true, 4973 req->reason_code); 4974 return 0; 4975 } 4976 4977 return -ENOTCONN; 4978 } 4979 4980 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 4981 struct cfg80211_disassoc_request *req) 4982 { 4983 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4984 u8 bssid[ETH_ALEN]; 4985 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4986 4987 /* 4988 * cfg80211 should catch this ... but it's racy since 4989 * we can receive a disassoc frame, process it, hand it 4990 * to cfg80211 while that's in a locked section already 4991 * trying to tell us that the user wants to disconnect. 4992 */ 4993 if (ifmgd->associated != req->bss) 4994 return -ENOLINK; 4995 4996 sdata_info(sdata, 4997 "disassociating from %pM by local choice (Reason: %u=%s)\n", 4998 req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); 4999 5000 memcpy(bssid, req->bss->bssid, ETH_ALEN); 5001 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 5002 req->reason_code, !req->local_state_change, 5003 frame_buf); 5004 5005 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 5006 req->reason_code); 5007 5008 return 0; 5009 } 5010 5011 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 5012 { 5013 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5014 5015 /* 5016 * Make sure some work items will not run after this, 5017 * they will not do anything but might not have been 5018 * cancelled when disconnecting. 5019 */ 5020 cancel_work_sync(&ifmgd->monitor_work); 5021 cancel_work_sync(&ifmgd->beacon_connection_loss_work); 5022 cancel_work_sync(&ifmgd->request_smps_work); 5023 cancel_work_sync(&ifmgd->csa_connection_drop_work); 5024 cancel_work_sync(&ifmgd->chswitch_work); 5025 cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work); 5026 5027 sdata_lock(sdata); 5028 if (ifmgd->assoc_data) { 5029 struct cfg80211_bss *bss = ifmgd->assoc_data->bss; 5030 ieee80211_destroy_assoc_data(sdata, false, false); 5031 cfg80211_assoc_timeout(sdata->dev, bss); 5032 } 5033 if (ifmgd->auth_data) 5034 ieee80211_destroy_auth_data(sdata, false); 5035 spin_lock_bh(&ifmgd->teardown_lock); 5036 if (ifmgd->teardown_skb) { 5037 kfree_skb(ifmgd->teardown_skb); 5038 ifmgd->teardown_skb = NULL; 5039 ifmgd->orig_teardown_skb = NULL; 5040 } 5041 spin_unlock_bh(&ifmgd->teardown_lock); 5042 del_timer_sync(&ifmgd->timer); 5043 sdata_unlock(sdata); 5044 } 5045 5046 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 5047 enum nl80211_cqm_rssi_threshold_event rssi_event, 5048 gfp_t gfp) 5049 { 5050 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5051 5052 trace_api_cqm_rssi_notify(sdata, rssi_event); 5053 5054 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp); 5055 } 5056 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 5057 5058 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 5059 { 5060 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 5061 5062 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 5063 5064 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 5065 } 5066 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 5067